Per-glyph instance for color text as well

Doesn't quite work yet

gsk/gskprivate.c

@@ -15,3 +15,23 @@ gsk_ensure_resources (void)
 
   g_once (&register_resources_once, register_resources, NULL);
 }
+
+int
+pango_glyph_string_num_glyphs (PangoGlyphString *glyphs)
+{
+  int i, count;
+
+  count = 0;
+  for (i = 0; i < glyphs->num_glyphs; i++)
+    {
+      PangoGlyphInfo *gi = &glyphs->glyphs[i];
+      if (gi->glyph != PANGO_GLYPH_EMPTY)
+        {
+          if (!(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
+            count++;
+        }
+    }
+
+  return count;
+}
+

gsk/gskprivate.h

@@ -2,11 +2,14 @@
 #define __GSK_PRIVATE_H__
 
 #include <glib.h>
+#include <pango/pango.h>
 
 G_BEGIN_DECLS
 
 void gsk_ensure_resources (void);
 
+int pango_glyph_string_num_glyphs (PangoGlyphString *glyphs);
+
 G_END_DECLS
 
 #endif /* __GSK_PRIVATE_H__ */

gsk/gskrendernode.h

@@ -178,10 +178,8 @@ GDK_AVAILABLE_IN_3_92
 GskRenderNode *         gsk_text_node_new                       (PangoFont        *font,
                                                                  PangoGlyphString *glyphs,
                                                                  const GdkRGBA    *color,
-                                                                 int               x_offset,
-                                                                 int               y_offset,
-                                                                 double            base_x,
-                                                                 double            base_y);
+                                                                 double            x,
+                                                                 double            y);
 
 GDK_AVAILABLE_IN_3_92
 GskRenderNode *         gsk_blur_node_new                       (GskRenderNode *child,

gsk/gskrendernodeimpl.c

@@ -26,8 +26,6 @@
 #include "gskroundedrectprivate.h"
 #include "gsktextureprivate.h"
 
-#include <cairo-ft.h>
-
 static gboolean
 check_variant_type (GVariant *variant,
                     const char *type_string,
@@ -3812,13 +3810,13 @@ struct _GskTextNode
   GskRenderNode render_node;
 
   PangoFont *font;
-  gboolean has_color;
   PangoGlyphString *glyphs;
+
   GdkRGBA color;
-  int x_offset;
-  int y_offset;
-  double base_x;
-  double base_y;
+  double x;
+  double y;
+  double ink_rect_y;
+  double ink_rect_height;
 };
 
 static void
@@ -3830,20 +3828,6 @@ gsk_text_node_finalize (GskRenderNode *node)
   pango_glyph_string_free (self->glyphs);
 }
 
-static gboolean
-_pango_cairo_font_install (PangoFont *font,
-                           cairo_t   *cr)
-{
-  cairo_scaled_font_t *scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
-
-  if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
-    return FALSE;
-
-  cairo_set_scaled_font (cr, scaled_font);
-
-  return TRUE;
-}
-
 #ifndef STACK_BUFFER_SIZE
 #define STACK_BUFFER_SIZE (512 * sizeof (int))
 #endif
@@ -3857,16 +3841,19 @@ gsk_text_node_draw (GskRenderNode *node,
   GskTextNode *self = (GskTextNode *) node;
   int i, count;
   int x_position = 0;
+  cairo_scaled_font_t *scaled_font;
   cairo_glyph_t *cairo_glyphs;
   cairo_glyph_t stack_glyphs[STACK_ARRAY_LENGTH (cairo_glyph_t)];
 
+  scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)self->font);
+  if (G_UNLIKELY (!scaled_font || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
+    return;
+
   cairo_save (cr);
 
-  cairo_translate (cr, self->x_offset, self->y_offset);
-
+  cairo_translate (cr, self->x, self->y);
+  cairo_set_scaled_font (cr, scaled_font);
   gdk_cairo_set_source_rgba (cr, &self->color);
-  if (!_pango_cairo_font_install (self->font, cr))
-    goto done;
 
   if (self->glyphs->num_glyphs > (int) G_N_ELEMENTS (stack_glyphs))
     cairo_glyphs = g_new (cairo_glyph_t, self->glyphs->num_glyphs);
@@ -3880,8 +3867,8 @@ gsk_text_node_draw (GskRenderNode *node,
 
       if (gi->glyph != PANGO_GLYPH_EMPTY)
         {
-          double cx = self->base_x + (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
-          double cy = gi->geometry.y_offset == 0 ? self->base_y : self->base_y + (double)(gi->geometry.y_offset) / PANGO_SCALE;
+          double cx = (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
+          double cy = (double)(gi->geometry.y_offset) / PANGO_SCALE;
 
           if (!(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
             {
@@ -3899,107 +3886,22 @@ gsk_text_node_draw (GskRenderNode *node,
   if (cairo_glyphs != stack_glyphs)
     g_free (cairo_glyphs);
 
-done:
   cairo_restore (cr);
 }
 
-#define GSK_TEXT_NODE_VARIANT_TYPE "(sddddiidda(uiiii))"
-
 static GVariant *
 gsk_text_node_serialize (GskRenderNode *node)
 {
-  GskTextNode *self = (GskTextNode *) node;
-  GVariant *v;
-  GVariantBuilder builder;
-  int i;
-  PangoFontDescription *desc;
-  char *s;
-
-  desc = pango_font_describe (self->font);
-  s = pango_font_description_to_string (desc);
-  for (i = 0; i < self->glyphs->num_glyphs; i++)
-    {
-      PangoGlyphInfo *glyph = &self->glyphs->glyphs[i];
-      g_variant_builder_add (&builder, "(uiiii)",
-                             glyph->glyph,
-                             glyph->geometry.width,
-                             glyph->geometry.x_offset,
-                             glyph->geometry.y_offset,
-                             glyph->attr.is_cluster_start);
-    }
-
-  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a(uiiii)"));
-  v = g_variant_new (GSK_TEXT_NODE_VARIANT_TYPE,
-                     s,
-                     self->color.red,
-                     self->color.green,
-                     self->color.blue,
-                     self->color.alpha,
-                     self->x_offset,
-                     self->y_offset,
-                     self->base_x,
-                     self->base_y,
-                     &builder);
-
-  g_free (s);
-  pango_font_description_free (desc);
-
-  return v;
+  g_assert_not_reached ();
+  return NULL;
 }
 
 static GskRenderNode *
 gsk_text_node_deserialize (GVariant  *variant,
                            GError   **error)
 {
-  PangoFont *font;
-  PangoGlyphString *glyphs;
-  GVariantIter iter;
-  GskRenderNode *result;
-  PangoGlyphInfo glyph;
-  PangoFontDescription *desc;
-  PangoFontMap *fontmap;
-  PangoContext *context;
-  int cluster_start;
-  char *s;
-  GdkRGBA color;
-  int x_offset, y_offset;
-  double base_x, base_y;
-  int i;
-
-  if (!check_variant_type (variant, GSK_TEXT_NODE_VARIANT_TYPE, error))
-    return NULL;
-
-  g_variant_get (variant, "(&sddddiidda(uiiii))",
-                 &color.red, &color.green, &color.blue, &color.alpha,
-                 &x_offset, &y_offset,
-                 &base_x, &base_y,
-                 &s, &iter);
-
-  desc = pango_font_description_from_string (s);
-  fontmap = pango_cairo_font_map_get_default ();
-  context = pango_font_map_create_context (fontmap);
-  font = pango_font_map_load_font (fontmap, context, desc);
-
-  glyphs = pango_glyph_string_new ();
-  pango_glyph_string_set_size (glyphs, g_variant_iter_n_children (&iter));
-  i = 0;
-  while (g_variant_iter_next (&iter, "(uiiii)", &glyph.glyph, &glyph.geometry.width, &glyph.geometry.x_offset, &glyph.geometry.y_offset, &cluster_start))
-    {
-      glyph.attr.is_cluster_start = cluster_start;
-      glyphs->glyphs[i] = glyph;
-      i++;
-    }
-
-  result = gsk_text_node_new (font, glyphs, &color, /* FIXME: Avoid copying glyphs */
-                              x_offset, y_offset,
-                              base_x, base_y);
-
-  pango_glyph_string_free (glyphs);
-  pango_font_description_free (desc);
-  g_object_unref (context);
-  g_object_unref (font);
-
-  return result;
+  g_assert_not_reached ();
+  return NULL;
 }
 
 static const GskRenderNodeClass GSK_TEXT_NODE_CLASS = {
@@ -4012,31 +3914,12 @@ static const GskRenderNodeClass GSK_TEXT_NODE_CLASS = {
   gsk_text_node_deserialize
 };
 
-static gboolean
-font_has_color_glyphs (PangoFont *font)
-{
-  cairo_scaled_font_t *scaled_font;
-  gboolean has_color = FALSE;
-
-  scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
-  if (cairo_scaled_font_get_type (scaled_font) == CAIRO_FONT_TYPE_FT)
-    {
-      FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
-      has_color = (FT_HAS_COLOR (ft_face) != 0);
-      cairo_ft_scaled_font_unlock_face (scaled_font);
-    }
-
-  return has_color;
-}
-
 GskRenderNode *
 gsk_text_node_new (PangoFont        *font,
                    PangoGlyphString *glyphs,
                    const GdkRGBA    *color,
-                   int               x_offset,
-                   int               y_offset,
-                   double            base_x,
-                   double            base_y)
+                   double            x,
+                   double            y)
 {
   GskTextNode *self;
   PangoRectangle ink_rect;
@@ -4053,23 +3936,70 @@ gsk_text_node_new (PangoFont        *font,
   self->font = g_object_ref (font);
   self->glyphs = pango_glyph_string_copy (glyphs);
   self->color = *color;
-  self->x_offset = x_offset;
-  self->y_offset = y_offset;
-  self->base_x = base_x;
-  self->base_y = base_y;
-
-  self->has_color = font_has_color_glyphs (font);
-
+  self->x = x;
+  self->y = y;
+  self->ink_rect_y = ink_rect.y;
+  self->ink_rect_height = ink_rect.height;
 
   graphene_rect_init (&self->render_node.bounds,
-                      x_offset + base_x + ink_rect.x,
-                      y_offset + base_y + ink_rect.y,
-                      ink_rect.width,
+                      x,
+                      y + ink_rect.y,
+                      ink_rect.x + ink_rect.width,
                       ink_rect.height);
 
   return &self->render_node;
 }
 
+const GdkRGBA *
+gsk_text_node_get_color (GskRenderNode *node)
+{
+  GskTextNode *self = (GskTextNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXT_NODE), NULL);
+
+  return &self->color;
+}
+
+PangoFont *
+gsk_text_node_get_font (GskRenderNode *node)
+{
+  GskTextNode *self = (GskTextNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXT_NODE), NULL);
+
+  return self->font;
+}
+
+PangoGlyphString *
+gsk_text_node_get_glyphs (GskRenderNode *node)
+{
+  GskTextNode *self = (GskTextNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXT_NODE), NULL);
+
+  return self->glyphs;
+}
+
+float
+gsk_text_node_get_x (GskRenderNode *node)
+{
+  GskTextNode *self = (GskTextNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXT_NODE), 0.0);
+
+  return (float)self->x;
+}
+
+float
+gsk_text_node_get_y (GskRenderNode *node)
+{
+  GskTextNode *self = (GskTextNode *) node;
+
+  g_return_val_if_fail (GSK_IS_RENDER_NODE_TYPE (node, GSK_TEXT_NODE), 0.0);
+
+  return (float)self->y;
+}
+
 /*** GSK_BLUR_NODE ***/
 
 typedef struct _GskBlurNode GskBlurNode;

gsk/gskrendernodeprivate.h

@@ -81,6 +81,12 @@ cairo_surface_t *gsk_cairo_node_get_surface (GskRenderNode *node);
 
 GskTexture *gsk_texture_node_get_texture (GskRenderNode *node);
 
+PangoFont *gsk_text_node_get_font (GskRenderNode *node);
+PangoGlyphString *gsk_text_node_get_glyphs (GskRenderNode *node);
+const GdkRGBA *gsk_text_node_get_color (GskRenderNode *node);
+float gsk_text_node_get_x (GskRenderNode *node);
+float gsk_text_node_get_y (GskRenderNode *node);
+
 const GdkRGBA *gsk_color_node_peek_color (GskRenderNode *node);
 
 const graphene_rect_t * gsk_clip_node_peek_clip (GskRenderNode *node);

gsk/gskvulkancolortextpipeline.c

@@ -0,0 +1,156 @@
+#include "config.h"
+
+#include "gskvulkancolortextpipelineprivate.h"
+
+struct _GskVulkanColorTextPipeline
+{
+  GObject parent_instance;
+};
+
+typedef struct _GskVulkanColorTextInstance GskVulkanColorTextInstance;
+
+struct _GskVulkanColorTextInstance
+{
+  float rect[4];
+  float tex_rect[4];
+};
+
+G_DEFINE_TYPE (GskVulkanColorTextPipeline, gsk_vulkan_color_text_pipeline, GSK_TYPE_VULKAN_PIPELINE)
+
+static const VkPipelineVertexInputStateCreateInfo *
+gsk_vulkan_color_text_pipeline_get_input_state_create_info (GskVulkanPipeline *self)
+{
+  static const VkVertexInputBindingDescription vertexBindingDescriptions[] = {
+      {
+          .binding = 0,
+          .stride = sizeof (GskVulkanColorTextInstance),
+          .inputRate = VK_VERTEX_INPUT_RATE_INSTANCE
+      }
+  };
+  static const VkVertexInputAttributeDescription vertexInputAttributeDescription[] = {
+      {
+          .location = 0,
+          .binding = 0,
+          .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+          .offset = G_STRUCT_OFFSET (GskVulkanColorTextInstance, rect),
+      },
+      {
+          .location = 1,
+          .binding = 0,
+          .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+          .offset = G_STRUCT_OFFSET (GskVulkanColorTextInstance, tex_rect),
+      },
+  };
+  static const VkPipelineVertexInputStateCreateInfo info = {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
+      .vertexBindingDescriptionCount = G_N_ELEMENTS (vertexBindingDescriptions),
+      .pVertexBindingDescriptions = vertexBindingDescriptions,
+      .vertexAttributeDescriptionCount = G_N_ELEMENTS (vertexInputAttributeDescription),
+      .pVertexAttributeDescriptions = vertexInputAttributeDescription
+  };
+
+  return &info;
+}
+
+static void
+gsk_vulkan_color_text_pipeline_finalize (GObject *gobject)
+{
+  //GskVulkanColorTextPipeline *self = GSK_VULKAN_COLOR_TEXT_PIPELINE (gobject);
+
+  G_OBJECT_CLASS (gsk_vulkan_color_text_pipeline_parent_class)->finalize (gobject);
+}
+
+static void
+gsk_vulkan_color_text_pipeline_class_init (GskVulkanColorTextPipelineClass *klass)
+{
+  GskVulkanPipelineClass *pipeline_class = GSK_VULKAN_PIPELINE_CLASS (klass);
+
+  G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_color_text_pipeline_finalize;
+
+  pipeline_class->get_input_state_create_info = gsk_vulkan_color_text_pipeline_get_input_state_create_info;
+}
+
+static void
+gsk_vulkan_color_text_pipeline_init (GskVulkanColorTextPipeline *self)
+{
+}
+
+GskVulkanPipeline *
+gsk_vulkan_color_text_pipeline_new (GskVulkanPipelineLayout *layout,
+                                    const char              *shader_name,
+                                    VkRenderPass             render_pass)
+{
+  return gsk_vulkan_pipeline_new_full (GSK_TYPE_VULKAN_COLOR_TEXT_PIPELINE, layout, shader_name, render_pass,
+                                       VK_BLEND_FACTOR_SRC_ALPHA, VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA);
+}
+
+gsize
+gsk_vulkan_color_text_pipeline_count_vertex_data (GskVulkanColorTextPipeline *pipeline,
+                                                  int                         num_instances)
+{
+  return sizeof (GskVulkanColorTextInstance) * num_instances;
+}
+
+void
+gsk_vulkan_color_text_pipeline_collect_vertex_data (GskVulkanColorTextPipeline *pipeline,
+                                                    guchar                     *data,
+                                                    GskVulkanRenderer          *renderer,
+                                                    const graphene_rect_t      *rect,
+                                                    PangoFont                  *font,
+                                                    PangoGlyphString           *glyphs,
+                                                    float                       x,
+                                                    float                       y)
+{
+  GskVulkanColorTextInstance *instances = (GskVulkanColorTextInstance *) data;
+  int i, count;
+  int x_position = 0;
+  float ink_rect_y;
+  float ink_rect_height;
+
+  /* XXX */
+  ink_rect_y = rect->origin.y - y;
+  ink_rect_height = rect->size.height;
+
+  count = 0;
+  for (i = 0; i < glyphs->num_glyphs; i++)
+    {
+      PangoGlyphInfo *gi = &glyphs->glyphs[i];
+
+      if (gi->glyph != PANGO_GLYPH_EMPTY)
+        {
+          double cx = (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
+          double cy = (double)(gi->geometry.y_offset) / PANGO_SCALE;
+
+          if (!(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
+            {
+              GskVulkanColorTextInstance *instance = &instances[count];
+
+              instance->rect[0] = x + cx;
+              instance->rect[1] = y + ink_rect_y + cy;
+              instance->rect[2] = (float)gi->geometry.width / PANGO_SCALE;
+              instance->rect[3] = ink_rect_height;
+              gsk_vulkan_renderer_get_glyph_coords (renderer, font, glyphs,
+                                                    gi->glyph,
+                                                    &instance->tex_rect[0],
+                                                    &instance->tex_rect[1],
+                                                    &instance->tex_rect[2],
+                                                    &instance->tex_rect[3]);
+              count++;
+           }
+       }
+     x_position += gi->geometry.width;
+   }
+}
+
+gsize
+gsk_vulkan_color_text_pipeline_draw (GskVulkanColorTextPipeline *pipeline,
+                                     VkCommandBuffer             command_buffer,
+                                     gsize                       offset,
+                                     gsize                       n_commands)
+{
+  vkCmdDraw (command_buffer,
+             6, n_commands,
+             0, offset);
+
+  return n_commands;
+}

gsk/gskvulkancolortextpipelineprivate.h

@@ -0,0 +1,38 @@
+#ifndef __GSK_VULKAN_COLOR_TEXT_PIPELINE_PRIVATE_H__
+#define __GSK_VULKAN_COLOR_TEXT_PIPELINE_PRIVATE_H__
+
+#include <graphene.h>
+
+#include "gskvulkanpipelineprivate.h"
+#include "gskvulkanrendererprivate.h"
+
+G_BEGIN_DECLS
+
+typedef struct _GskVulkanColorTextPipelineLayout GskVulkanColorTextPipelineLayout;
+
+#define GSK_TYPE_VULKAN_COLOR_TEXT_PIPELINE (gsk_vulkan_color_text_pipeline_get_type ())
+
+G_DECLARE_FINAL_TYPE (GskVulkanColorTextPipeline, gsk_vulkan_color_text_pipeline, GSK, VULKAN_COLOR_TEXT_PIPELINE, GskVulkanPipeline)
+
+GskVulkanPipeline *     gsk_vulkan_color_text_pipeline_new                   (GskVulkanPipelineLayout        *layout,
+                                                                              const char                     *shader_name,
+                                                                              VkRenderPass                    render_pass);
+
+gsize                   gsk_vulkan_color_text_pipeline_count_vertex_data     (GskVulkanColorTextPipeline     *pipeline,
+                                                                              int                             num_instances);
+void                    gsk_vulkan_color_text_pipeline_collect_vertex_data   (GskVulkanColorTextPipeline     *pipeline,
+                                                                              guchar                         *data,
+                                                                              GskVulkanRenderer              *renderer,
+                                                                              const graphene_rect_t          *rect,
+                                                                              PangoFont                      *font,
+                                                                              PangoGlyphString               *glyphs,
+                                                                              float                           x,
+                                                                              float                           y);
+gsize                   gsk_vulkan_color_text_pipeline_draw                  (GskVulkanColorTextPipeline     *pipeline,
+                                                                              VkCommandBuffer                 command_buffer,
+                                                                              gsize                           offset,
+                                                                              gsize                           n_commands);
+
+G_END_DECLS
+
+#endif /* __GSK_VULKAN_COLOR_TEXT_PIPELINE_PRIVATE_H__ */

gsk/gskvulkanpipeline.c

@@ -67,6 +67,19 @@ gsk_vulkan_pipeline_new (GType                    pipeline_type,
                          GskVulkanPipelineLayout *layout,
                          const char              *shader_name,
                          VkRenderPass             render_pass)
+{
+  return gsk_vulkan_pipeline_new_full (pipeline_type, layout, shader_name, render_pass,
+                                       VK_BLEND_FACTOR_ONE,
+                                       VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA);
+}
+
+GskVulkanPipeline *
+gsk_vulkan_pipeline_new_full (GType                    pipeline_type,
+                              GskVulkanPipelineLayout *layout,
+                              const char              *shader_name,
+                              VkRenderPass             render_pass,
+                              VkBlendFactor            srcBlendFactor,
+                              VkBlendFactor            dstBlendFactor)
 {
   GskVulkanPipelinePrivate *priv;
   GskVulkanPipeline *self;
@@ -134,11 +147,11 @@ gsk_vulkan_pipeline_new (GType                    pipeline_type,
                                                        {
                                                            .blendEnable = VK_TRUE,
                                                            .colorBlendOp = VK_BLEND_OP_ADD,
-                                                           .srcColorBlendFactor = VK_BLEND_FACTOR_ONE,
-                                                           .dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
+                                                           .srcColorBlendFactor = srcBlendFactor,
+                                                           .dstColorBlendFactor = dstBlendFactor,
                                                            .alphaBlendOp = VK_BLEND_OP_ADD,
-                                                           .srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE,
-                                                           .dstAlphaBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
+                                                           .srcAlphaBlendFactor = srcBlendFactor,
+                                                           .dstAlphaBlendFactor = dstBlendFactor,
                                                            .colorWriteMask = VK_COLOR_COMPONENT_A_BIT
                                                                            | VK_COLOR_COMPONENT_R_BIT
                                                                            | VK_COLOR_COMPONENT_G_BIT

gsk/gskvulkanpipelineprivate.h

@@ -48,6 +48,12 @@ GskVulkanPipeline *     gsk_vulkan_pipeline_new                         (GType
                                                                          GskVulkanPipelineLayout        *layout,
                                                                          const char                     *shader_name,
                                                                          VkRenderPass                    render_pass);
+GskVulkanPipeline *     gsk_vulkan_pipeline_new_full                    (GType                           pipeline_type,
+                                                                         GskVulkanPipelineLayout        *layout,
+                                                                         const char                     *shader_name,
+                                                                         VkRenderPass                    render_pass,
+                                                                         VkBlendFactor                   srcBlendFactor,
+                                                                         VkBlendFactor                   dstBlendFactor);
 
 VkPipeline              gsk_vulkan_pipeline_get_pipeline                (GskVulkanPipeline              *self);
 

gsk/gskvulkanrender.c

@@ -15,8 +15,10 @@
 #include "gskvulkanborderpipelineprivate.h"
 #include "gskvulkanboxshadowpipelineprivate.h"
 #include "gskvulkancolorpipelineprivate.h"
+#include "gskvulkancolortextpipelineprivate.h"
 #include "gskvulkaneffectpipelineprivate.h"
 #include "gskvulkanlineargradientpipelineprivate.h"
+#include "gskvulkantextpipelineprivate.h"
 
 #define ORTHO_NEAR_PLANE        -10000
 #define ORTHO_FAR_PLANE          10000
@@ -303,7 +305,7 @@ gsk_vulkan_render_collect_vertex_data (GskVulkanRender *self)
 
   for (l = self->render_passes; l; l = l->next)
     {
-      offset += gsk_vulkan_render_pass_collect_vertex_data (l->data, data, offset, n_bytes - offset);
+      offset += gsk_vulkan_render_pass_collect_vertex_data (l->data, self, data, offset, n_bytes - offset);
       g_assert (offset <= n_bytes);
     }
 
@@ -344,6 +346,12 @@ gsk_vulkan_render_get_pipeline (GskVulkanRender       *self,
     { "blur", gsk_vulkan_blur_pipeline_new },
     { "blur-clip", gsk_vulkan_blur_pipeline_new },
     { "blur-clip-rounded", gsk_vulkan_blur_pipeline_new },
+    { "mask", gsk_vulkan_text_pipeline_new },
+    { "mask-clip", gsk_vulkan_text_pipeline_new },
+    { "mask-clip-rounded", gsk_vulkan_text_pipeline_new },
+    { "blend", gsk_vulkan_color_text_pipeline_new },
+    { "blend-clip", gsk_vulkan_color_text_pipeline_new },
+    { "blend-clip-rounded", gsk_vulkan_color_text_pipeline_new },
   };
 
   g_return_val_if_fail (type < GSK_VULKAN_N_PIPELINES, NULL);

gsk/gskvulkanrenderer.c

@@ -44,6 +44,8 @@ struct _GskVulkanRenderer
 
   GSList *textures;
 
+  GHashTable *glyph_cache;
+
 #ifdef G_ENABLE_DEBUG
   ProfileTimers profile_timers;
 #endif
@@ -343,3 +345,271 @@ gsk_vulkan_renderer_ref_texture_image (GskVulkanRenderer *self,
 
   return image;
 }
+
+#ifndef STACK_BUFFER_SIZE
+#define STACK_BUFFER_SIZE (512 * sizeof (int))
+#endif
+
+#define STACK_ARRAY_LENGTH(T) (STACK_BUFFER_SIZE / sizeof(T))
+
+typedef struct {
+  PangoGlyph glyph;
+  float x, y, width, height;
+} GlyphCoords;
+
+static void
+render_text (cairo_t          *cr,
+             PangoFont        *font,
+             PangoGlyphString *glyphs,
+             GlyphCoords      *coords,
+             int              *num_coords,
+             float             x,
+             float             y,
+             float             width,
+             float             height)
+{
+  int i, count;
+  int x_position = 0;
+  cairo_scaled_font_t *scaled_font;
+  cairo_glyph_t *cairo_glyphs;
+  cairo_glyph_t stack_glyphs[STACK_ARRAY_LENGTH (cairo_glyph_t)];
+
+  scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
+  if (G_UNLIKELY (!scaled_font || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
+    return;
+
+  cairo_set_scaled_font (cr, scaled_font);
+  cairo_set_source_rgba (cr, 0, 0, 0, 1);
+
+  if (glyphs->num_glyphs > (int) G_N_ELEMENTS (stack_glyphs))
+    cairo_glyphs = g_new (cairo_glyph_t, glyphs->num_glyphs);
+  else
+    cairo_glyphs = stack_glyphs;
+
+  count = 0;
+  for (i = 0; i < glyphs->num_glyphs; i++)
+    {
+      PangoGlyphInfo *gi = &glyphs->glyphs[i];
+
+      if (gi->glyph != PANGO_GLYPH_EMPTY)
+        {
+          double cx = x + (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
+          double cy = y + (double)(gi->geometry.y_offset) / PANGO_SCALE;
+
+          if (!(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
+            {
+              cairo_glyphs[count].index = gi->glyph;
+              cairo_glyphs[count].x = cx;
+              cairo_glyphs[count].y = cy;
+
+              coords[count].glyph = gi->glyph;
+              coords[count].x = cx / width;
+              coords[count].y = 0.0;
+              coords[count].width = (float)gi->geometry.width / (PANGO_SCALE * width);
+              coords[count].height = 1.0; // FIXME get actual glyph height
+
+              count++;
+            }
+        }
+      x_position += gi->geometry.width;
+    }
+
+  *num_coords = count;
+
+  cairo_show_glyphs (cr, cairo_glyphs, count);
+
+  if (cairo_glyphs != stack_glyphs)
+    g_free (cairo_glyphs);
+}
+
+typedef struct {
+  PangoFont *font;
+  PangoGlyphString *glyphs;
+  guint hash;
+  GlyphCoords *coords;
+  int num_coords;
+} CacheItem;
+
+static guint
+item_hash (gconstpointer key)
+{
+  const CacheItem *item = key;
+  PangoFontDescription *desc;
+  guint32 h = 5381;
+  char *p, *end;
+
+  if (item->hash != 0)
+    return item->hash;
+
+  end = ((char *)&item->glyphs->glyphs[item->glyphs->num_glyphs]);
+  for (p = (char *)item->glyphs->glyphs; p < end; p++)
+    h = (h << 5) + h + *p;
+
+  desc = pango_font_describe (item->font);
+  h ^= pango_font_description_hash (desc);
+  pango_font_description_free (desc);
+
+  if (h == 0)
+    h = 1;
+
+  return h;
+}
+
+static gboolean
+item_equal (gconstpointer v1, gconstpointer v2)
+{
+  const CacheItem *i1 = v1;
+  const CacheItem *i2 = v2;
+  int i;
+  PangoFontDescription *desc1, *desc2;
+  gboolean ret;
+
+  if (i1->glyphs->num_glyphs != i2->glyphs->num_glyphs)
+    return FALSE;
+
+  for (i = 0; i < i1->glyphs->num_glyphs; i++)
+    {
+      if (i1->glyphs->glyphs[i].glyph != i2->glyphs->glyphs[i].glyph)
+        return FALSE;
+    }
+
+  desc1 = pango_font_describe (i1->font);
+  desc2 = pango_font_describe (i2->font);
+  ret = pango_font_description_equal (desc1, desc2);
+  pango_font_description_free (desc1);
+  pango_font_description_free (desc2);
+
+  return ret;
+}
+
+static void
+item_free (gpointer data)
+{
+  CacheItem *item = data;
+
+  g_object_unref (item->font);
+  pango_glyph_string_free (item->glyphs);
+  g_free (item->coords);
+  g_free (item);
+}
+
+static void
+ensure_cache (GskVulkanRenderer *renderer)
+{
+  if (!renderer->glyph_cache)
+    renderer->glyph_cache = g_hash_table_new_full (item_hash, item_equal, NULL, item_free);
+}
+
+static int
+find_cached_item (GskVulkanRenderer *renderer, PangoFont *font, PangoGlyphString *glyphs, GlyphCoords **coords)
+{
+  CacheItem key;
+  CacheItem *value;
+
+  key.font = font;
+  key.glyphs = glyphs;
+  key.hash = 0;
+  key.coords = NULL;
+  key.num_coords = 0;
+
+  ensure_cache (renderer);
+
+  value = g_hash_table_lookup (renderer->glyph_cache, &key);
+  if (value)
+    {
+      *coords = value->coords;
+      return value->num_coords;
+    }
+
+  return 0;
+}
+
+static void
+cache_item (GskVulkanRenderer *renderer, PangoFont *font, PangoGlyphString *glyphs, GlyphCoords *coords, int num_coords)
+{
+  CacheItem *item;
+
+  item = g_new (CacheItem, 1);
+
+  item->font = g_object_ref (font);
+  item->glyphs = pango_glyph_string_copy (glyphs);
+  item->hash = 0;
+  item->coords = coords;
+  item->num_coords = num_coords;
+
+  ensure_cache (renderer);
+
+  g_hash_table_add (renderer->glyph_cache, item);
+}
+
+GskVulkanImage *
+gsk_vulkan_renderer_ref_glyph_image (GskVulkanRenderer  *self,
+                                     GskVulkanUploader  *uploader,
+                                     PangoFont          *font,
+                                     PangoGlyphString   *glyphs)
+{
+  PangoRectangle ink_rect;
+  cairo_surface_t *surface;
+  cairo_t *cr;
+  GskVulkanImage *image;
+  GlyphCoords *coords;
+  int num_coords;
+
+  coords = g_new0 (GlyphCoords, glyphs->num_glyphs);
+
+  pango_glyph_string_extents (glyphs, font, &ink_rect, NULL);
+  pango_extents_to_pixels (&ink_rect, NULL);
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+                                        ink_rect.x + ink_rect.width,
+                                        ink_rect.height);
+
+  cr = cairo_create (surface);
+  render_text (cr, font, glyphs, coords, &num_coords,
+               0, - ink_rect.y, ink_rect.x + ink_rect.width, ink_rect.height);
+  cairo_destroy (cr);
+
+  image = gsk_vulkan_image_new_from_data (uploader,
+                                          cairo_image_surface_get_data (surface),
+                                          cairo_image_surface_get_width (surface),
+                                          cairo_image_surface_get_height (surface),
+                                          cairo_image_surface_get_stride (surface));
+  cairo_surface_destroy (surface);
+
+  cache_item (self, font, glyphs, coords, num_coords);
+
+  return image;
+}
+
+void
+gsk_vulkan_renderer_get_glyph_coords (GskVulkanRenderer *self,
+                                      PangoFont         *font,
+                                      PangoGlyphString  *glyphs,
+                                      PangoGlyph         glyph,
+                                      float             *x,
+                                      float             *y,
+                                      float             *width,
+                                      float             *height)
+{
+  GlyphCoords *coords;
+  int num_coords;
+  int i;
+
+  *x = 0.0;
+  *y = 0.0;
+  *width = 1.0;
+  *height = 1.0;
+
+  num_coords = find_cached_item (self, font, glyphs, &coords);
+  for (i = 0; i < num_coords; i++)
+    {
+      if (coords[i].glyph == glyph)
+        {
+          *x = coords[i].x;
+          *y = coords[i].y;
+          *width = coords[i].width;
+          *height = coords[i].height;
+          break;
+        }
+    }
+}

gsk/gskvulkanrendererprivate.h

@@ -25,6 +25,23 @@ GskVulkanImage *        gsk_vulkan_renderer_ref_texture_image           (GskVulk
                                                                          GskTexture             *texture,
                                                                          GskVulkanUploader      *uploader);
 
+typedef struct {
+  float x, y, width, height;
+} GskRectangle;
+
+GskVulkanImage *        gsk_vulkan_renderer_ref_glyph_image             (GskVulkanRenderer      *self,
+                                                                         GskVulkanUploader      *uploader,
+                                                                         PangoFont              *font,
+                                                                         PangoGlyphString       *glyphs);
+void                    gsk_vulkan_renderer_get_glyph_coords            (GskVulkanRenderer      *self,
+                                                                         PangoFont              *font,
+                                                                         PangoGlyphString       *glyphs,
+                                                                         PangoGlyph              glyph,
+                                                                         float                  *x,
+                                                                         float                  *y,
+                                                                         float                  *width,
+                                                                         float                  *height);
+
 G_END_DECLS
 
 #endif /* __GSK_VULKAN_RENDERER_PRIVATE_H__ */

gsk/gskvulkanrenderpass.c

@@ -12,11 +12,16 @@
 #include "gskvulkanboxshadowpipelineprivate.h"
 #include "gskvulkanclipprivate.h"
 #include "gskvulkancolorpipelineprivate.h"
+#include "gskvulkancolortextpipelineprivate.h"
 #include "gskvulkaneffectpipelineprivate.h"
 #include "gskvulkanlineargradientpipelineprivate.h"
+#include "gskvulkantextpipelineprivate.h"
 #include "gskvulkanimageprivate.h"
 #include "gskvulkanpushconstantsprivate.h"
 #include "gskvulkanrendererprivate.h"
+#include "gskprivate.h"
+
+#include <cairo-ft.h>
 
 typedef union _GskVulkanOp GskVulkanOp;
 typedef struct _GskVulkanOpRender GskVulkanOpRender;
@@ -29,6 +34,8 @@ typedef enum {
   GSK_VULKAN_OP_FALLBACK_ROUNDED_CLIP,
   GSK_VULKAN_OP_SURFACE,
   GSK_VULKAN_OP_TEXTURE,
+  GSK_VULKAN_OP_TEXT,
+  GSK_VULKAN_OP_COLOR_TEXT,
   GSK_VULKAN_OP_COLOR,
   GSK_VULKAN_OP_LINEAR_GRADIENT,
   GSK_VULKAN_OP_OPACITY,
@@ -95,6 +102,23 @@ gsk_vulkan_render_pass_free (GskVulkanRenderPass *self)
   g_slice_free (GskVulkanRenderPass, self);
 }
 
+static gboolean
+font_has_color_glyphs (PangoFont *font)
+{
+  cairo_scaled_font_t *scaled_font;
+  gboolean has_color = FALSE;
+
+  scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
+  if (cairo_scaled_font_get_type (scaled_font) == CAIRO_FONT_TYPE_FT)
+    {
+      FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
+      has_color = (FT_HAS_COLOR (ft_face) != 0);
+      cairo_ft_scaled_font_unlock_face (scaled_font);
+    }
+
+  return has_color;
+}
+
 #define FALLBACK(...) G_STMT_START { \
   GSK_NOTE (FALLBACK, g_print (__VA_ARGS__)); \
   goto fallback; \
@@ -172,6 +196,35 @@ gsk_vulkan_render_pass_add_node (GskVulkanRenderPass           *self,
       g_array_append_val (self->render_ops, op);
       return;
 
+    case GSK_TEXT_NODE:
+      if (font_has_color_glyphs (gsk_text_node_get_font (node)))
+        {
+          if (gsk_vulkan_clip_contains_rect (&constants->clip, &node->bounds))
+            pipeline_type = GSK_VULKAN_PIPELINE_COLOR_TEXT;
+          else if (constants->clip.type == GSK_VULKAN_CLIP_RECT)
+            pipeline_type = GSK_VULKAN_PIPELINE_COLOR_TEXT_CLIP;
+          else if (constants->clip.type == GSK_VULKAN_CLIP_ROUNDED_CIRCULAR)
+            pipeline_type = GSK_VULKAN_PIPELINE_COLOR_TEXT_CLIP_ROUNDED;
+          else
+            FALLBACK ("Text nodes can't deal with clip type %u\n", constants->clip.type);
+          op.type = GSK_VULKAN_OP_COLOR_TEXT;
+        }
+      else
+        {
+          if (gsk_vulkan_clip_contains_rect (&constants->clip, &node->bounds))
+            pipeline_type = GSK_VULKAN_PIPELINE_TEXT;
+          else if (constants->clip.type == GSK_VULKAN_CLIP_RECT)
+            pipeline_type = GSK_VULKAN_PIPELINE_TEXT_CLIP;
+          else if (constants->clip.type == GSK_VULKAN_CLIP_ROUNDED_CIRCULAR)
+            pipeline_type = GSK_VULKAN_PIPELINE_TEXT_CLIP_ROUNDED;
+          else
+            FALLBACK ("Text nodes can't deal with clip type %u\n", constants->clip.type);
+          op.type = GSK_VULKAN_OP_TEXT;
+        }
+      op.render.pipeline = gsk_vulkan_render_get_pipeline (render, pipeline_type);
+      g_array_append_val (self->render_ops, op);
+      return;
+
     case GSK_TEXTURE_NODE:
       if (gsk_vulkan_clip_contains_rect (&constants->clip, &node->bounds))
         pipeline_type = GSK_VULKAN_PIPELINE_BLEND;
@@ -528,7 +581,9 @@ gsk_vulkan_render_pass_upload (GskVulkanRenderPass  *self,
 
         case GSK_VULKAN_OP_SURFACE:
           {
-            cairo_surface_t *surface = gsk_cairo_node_get_surface (op->render.node);
+            cairo_surface_t *surface;
+
+            surface = gsk_cairo_node_get_surface (op->render.node);
             op->render.source = gsk_vulkan_image_new_from_data (uploader,
                                                                 cairo_image_surface_get_data (surface),
                                                                 cairo_image_surface_get_width (surface),
@@ -538,6 +593,17 @@ gsk_vulkan_render_pass_upload (GskVulkanRenderPass  *self,
           }
           break;
 
+        case GSK_VULKAN_OP_TEXT:
+        case GSK_VULKAN_OP_COLOR_TEXT:
+          {
+            op->render.source = gsk_vulkan_renderer_ref_glyph_image (GSK_VULKAN_RENDERER (gsk_vulkan_render_get_renderer (render)),
+                                                                     uploader,
+                                                                     gsk_text_node_get_font (op->render.node),
+                                                                     gsk_text_node_get_glyphs (op->render.node));
+            gsk_vulkan_render_add_cleanup_image (render, op->render.source);
+          }
+          break;
+
         case GSK_VULKAN_OP_TEXTURE:
           {
             op->render.source = gsk_vulkan_renderer_ref_texture_image (GSK_VULKAN_RENDERER (gsk_vulkan_render_get_renderer (render)),
@@ -619,6 +685,18 @@ gsk_vulkan_render_pass_count_vertex_data (GskVulkanRenderPass *self)
           n_bytes += op->render.vertex_count;
           break;
 
+        case GSK_VULKAN_OP_TEXT:
+          op->render.vertex_count = gsk_vulkan_text_pipeline_count_vertex_data (GSK_VULKAN_TEXT_PIPELINE (op->render.pipeline),
+                                                                                pango_glyph_string_num_glyphs (gsk_text_node_get_glyphs (op->render.node)));
+          n_bytes += op->render.vertex_count;
+          break;
+
+        case GSK_VULKAN_OP_COLOR_TEXT:
+          op->render.vertex_count = gsk_vulkan_color_text_pipeline_count_vertex_data (GSK_VULKAN_COLOR_TEXT_PIPELINE (op->render.pipeline),
+                                                                                      pango_glyph_string_num_glyphs (gsk_text_node_get_glyphs (op->render.node)));
+          n_bytes += op->render.vertex_count;
+          break;
+
         case GSK_VULKAN_OP_COLOR:
           op->render.vertex_count = gsk_vulkan_color_pipeline_count_vertex_data (GSK_VULKAN_COLOR_PIPELINE (op->render.pipeline));
           n_bytes += op->render.vertex_count;
@@ -663,6 +741,7 @@ gsk_vulkan_render_pass_count_vertex_data (GskVulkanRenderPass *self)
 
 gsize
 gsk_vulkan_render_pass_collect_vertex_data (GskVulkanRenderPass *self,
+                                            GskVulkanRender     *render,
                                             guchar              *data,
                                             gsize                offset,
                                             gsize                total)
@@ -692,6 +771,37 @@ gsk_vulkan_render_pass_collect_vertex_data (GskVulkanRenderPass *self,
           }
           break;
 
+        case GSK_VULKAN_OP_TEXT:
+          {
+            op->render.vertex_offset = offset + n_bytes;
+            gsk_vulkan_text_pipeline_collect_vertex_data (GSK_VULKAN_TEXT_PIPELINE (op->render.pipeline),
+                                                          data + n_bytes + offset,
+                                                          GSK_VULKAN_RENDERER (gsk_vulkan_render_get_renderer (render)),
+                                                          &op->render.node->bounds,
+                                                          gsk_text_node_get_font (op->render.node),
+                                                          gsk_text_node_get_glyphs (op->render.node),
+                                                          gsk_text_node_get_color (op->render.node),
+                                                          gsk_text_node_get_x (op->render.node),
+                                                          gsk_text_node_get_y (op->render.node));
+            n_bytes += op->render.vertex_count;
+          }
+          break;
+
+        case GSK_VULKAN_OP_COLOR_TEXT:
+          {
+            op->render.vertex_offset = offset + n_bytes;
+            gsk_vulkan_color_text_pipeline_collect_vertex_data (GSK_VULKAN_COLOR_TEXT_PIPELINE (op->render.pipeline),
+                                                                data + n_bytes + offset,
+                                                                GSK_VULKAN_RENDERER (gsk_vulkan_render_get_renderer (render)),
+                                                                &op->render.node->bounds,
+                                                                gsk_text_node_get_font (op->render.node),
+                                                                gsk_text_node_get_glyphs (op->render.node),
+                                                                gsk_text_node_get_x (op->render.node),
+                                                                gsk_text_node_get_y (op->render.node));
+            n_bytes += op->render.vertex_count;
+          }
+          break;
+
         case GSK_VULKAN_OP_COLOR:
           {
             op->render.vertex_offset = offset + n_bytes;
@@ -834,6 +944,8 @@ gsk_vulkan_render_pass_reserve_descriptor_sets (GskVulkanRenderPass *self,
         case GSK_VULKAN_OP_FALLBACK_CLIP:
         case GSK_VULKAN_OP_FALLBACK_ROUNDED_CLIP:
         case GSK_VULKAN_OP_SURFACE:
+        case GSK_VULKAN_OP_TEXT:
+        case GSK_VULKAN_OP_COLOR_TEXT:
         case GSK_VULKAN_OP_TEXTURE:
         case GSK_VULKAN_OP_OPACITY:
         case GSK_VULKAN_OP_BLUR:
@@ -910,6 +1022,72 @@ gsk_vulkan_render_pass_draw (GskVulkanRenderPass     *self,
                                                                 current_draw_index, 1);
           break;
 
+        case GSK_VULKAN_OP_TEXT:
+          if (current_pipeline != op->render.pipeline)
+            {
+              current_pipeline = op->render.pipeline;
+              vkCmdBindPipeline (command_buffer,
+                                 VK_PIPELINE_BIND_POINT_GRAPHICS,
+                                 gsk_vulkan_pipeline_get_pipeline (current_pipeline));
+              vkCmdBindVertexBuffers (command_buffer,
+                                      0,
+                                      1,
+                                      (VkBuffer[1]) {
+                                          gsk_vulkan_buffer_get_buffer (vertex_buffer)
+                                      },
+                                      (VkDeviceSize[1]) { op->render.vertex_offset });
+              current_draw_index = 0;
+            }
+
+          vkCmdBindDescriptorSets (command_buffer,
+                                   VK_PIPELINE_BIND_POINT_GRAPHICS,
+                                   gsk_vulkan_pipeline_layout_get_pipeline_layout (layout),
+                                   0,
+                                   1,
+                                   (VkDescriptorSet[1]) {
+                                       gsk_vulkan_render_get_descriptor_set (render, op->render.descriptor_set_index)
+                                   },
+                                   0,
+                                   NULL);
+
+          current_draw_index += gsk_vulkan_text_pipeline_draw (GSK_VULKAN_TEXT_PIPELINE (current_pipeline),
+                                                                command_buffer,
+                                                                current_draw_index, pango_glyph_string_num_glyphs (gsk_text_node_get_glyphs (op->render.node)));
+          break;
+
+        case GSK_VULKAN_OP_COLOR_TEXT:
+          if (current_pipeline != op->render.pipeline)
+            {
+              current_pipeline = op->render.pipeline;
+              vkCmdBindPipeline (command_buffer,
+                                 VK_PIPELINE_BIND_POINT_GRAPHICS,
+                                 gsk_vulkan_pipeline_get_pipeline (current_pipeline));
+              vkCmdBindVertexBuffers (command_buffer,
+                                      0,
+                                      1,
+                                      (VkBuffer[1]) {
+                                          gsk_vulkan_buffer_get_buffer (vertex_buffer)
+                                      },
+                                      (VkDeviceSize[1]) { op->render.vertex_offset });
+              current_draw_index = 0;
+            }
+
+          vkCmdBindDescriptorSets (command_buffer,
+                                   VK_PIPELINE_BIND_POINT_GRAPHICS,
+                                   gsk_vulkan_pipeline_layout_get_pipeline_layout (layout),
+                                   0,
+                                   1,
+                                   (VkDescriptorSet[1]) {
+                                       gsk_vulkan_render_get_descriptor_set (render, op->render.descriptor_set_index)
+                                   },
+                                   0,
+                                   NULL);
+
+          current_draw_index += gsk_vulkan_color_text_pipeline_draw (GSK_VULKAN_COLOR_TEXT_PIPELINE (current_pipeline),
+                                                                     command_buffer,
+                                                                     current_draw_index, pango_glyph_string_num_glyphs (gsk_text_node_get_glyphs (op->render.node)));
+          break;
+
         case GSK_VULKAN_OP_OPACITY:
         case GSK_VULKAN_OP_COLOR_MATRIX:
           if (current_pipeline != op->render.pipeline)

gsk/gskvulkanrenderpassprivate.h

@@ -26,6 +26,7 @@ void                    gsk_vulkan_render_pass_upload                   (GskVulk
 
 gsize                   gsk_vulkan_render_pass_count_vertex_data        (GskVulkanRenderPass    *self);
 gsize                   gsk_vulkan_render_pass_collect_vertex_data      (GskVulkanRenderPass    *self,
+                                                                         GskVulkanRender        *render,
                                                                          guchar                 *data,
                                                                          gsize                   offset,
                                                                          gsize                   total);

gsk/gskvulkanrenderprivate.h

@@ -34,6 +34,12 @@ typedef enum {
   GSK_VULKAN_PIPELINE_BLUR,
   GSK_VULKAN_PIPELINE_BLUR_CLIP,
   GSK_VULKAN_PIPELINE_BLUR_CLIP_ROUNDED,
+  GSK_VULKAN_PIPELINE_TEXT,
+  GSK_VULKAN_PIPELINE_TEXT_CLIP,
+  GSK_VULKAN_PIPELINE_TEXT_CLIP_ROUNDED,
+  GSK_VULKAN_PIPELINE_COLOR_TEXT,
+  GSK_VULKAN_PIPELINE_COLOR_TEXT_CLIP,
+  GSK_VULKAN_PIPELINE_COLOR_TEXT_CLIP_ROUNDED,
   /* add more */
   GSK_VULKAN_N_PIPELINES
 } GskVulkanPipelineType;

gsk/gskvulkantextpipeline.c

@@ -0,0 +1,169 @@
+#include "config.h"
+
+#include "gskvulkantextpipelineprivate.h"
+
+struct _GskVulkanTextPipeline
+{
+  GObject parent_instance;
+};
+
+typedef struct _GskVulkanTextInstance GskVulkanTextInstance;
+
+struct _GskVulkanTextInstance
+{
+  float rect[4];
+  float tex_rect[4];
+  float color[4];
+};
+
+G_DEFINE_TYPE (GskVulkanTextPipeline, gsk_vulkan_text_pipeline, GSK_TYPE_VULKAN_PIPELINE)
+
+static const VkPipelineVertexInputStateCreateInfo *
+gsk_vulkan_text_pipeline_get_input_state_create_info (GskVulkanPipeline *self)
+{
+  static const VkVertexInputBindingDescription vertexBindingDescriptions[] = {
+      {
+          .binding = 0,
+          .stride = sizeof (GskVulkanTextInstance),
+          .inputRate = VK_VERTEX_INPUT_RATE_INSTANCE
+      }
+  };
+  static const VkVertexInputAttributeDescription vertexInputAttributeDescription[] = {
+      {
+          .location = 0,
+          .binding = 0,
+          .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+          .offset = G_STRUCT_OFFSET (GskVulkanTextInstance, rect),
+      },
+      {
+          .location = 1,
+          .binding = 0,
+          .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+          .offset = G_STRUCT_OFFSET (GskVulkanTextInstance, tex_rect),
+      },
+      {
+          .location = 2,
+          .binding = 0,
+          .format = VK_FORMAT_R32G32B32A32_SFLOAT,
+          .offset = G_STRUCT_OFFSET (GskVulkanTextInstance, color),
+      }
+  };
+  static const VkPipelineVertexInputStateCreateInfo info = {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
+      .vertexBindingDescriptionCount = G_N_ELEMENTS (vertexBindingDescriptions),
+      .pVertexBindingDescriptions = vertexBindingDescriptions,
+      .vertexAttributeDescriptionCount = G_N_ELEMENTS (vertexInputAttributeDescription),
+      .pVertexAttributeDescriptions = vertexInputAttributeDescription
+  };
+
+  return &info;
+}
+
+static void
+gsk_vulkan_text_pipeline_finalize (GObject *gobject)
+{
+  //GskVulkanTextPipeline *self = GSK_VULKAN_TEXT_PIPELINE (gobject);
+
+  G_OBJECT_CLASS (gsk_vulkan_text_pipeline_parent_class)->finalize (gobject);
+}
+
+static void
+gsk_vulkan_text_pipeline_class_init (GskVulkanTextPipelineClass *klass)
+{
+  GskVulkanPipelineClass *pipeline_class = GSK_VULKAN_PIPELINE_CLASS (klass);
+
+  G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_text_pipeline_finalize;
+
+  pipeline_class->get_input_state_create_info = gsk_vulkan_text_pipeline_get_input_state_create_info;
+}
+
+static void
+gsk_vulkan_text_pipeline_init (GskVulkanTextPipeline *self)
+{
+}
+
+GskVulkanPipeline *
+gsk_vulkan_text_pipeline_new (GskVulkanPipelineLayout *layout,
+                               const char              *shader_name,
+                               VkRenderPass             render_pass)
+{
+  return gsk_vulkan_pipeline_new_full (GSK_TYPE_VULKAN_TEXT_PIPELINE, layout, shader_name, render_pass,
+                                       VK_BLEND_FACTOR_SRC_ALPHA, VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA);
+}
+
+gsize
+gsk_vulkan_text_pipeline_count_vertex_data (GskVulkanTextPipeline *pipeline,
+                                            int                    num_instances)
+{
+  return sizeof (GskVulkanTextInstance) * num_instances;
+}
+
+void
+gsk_vulkan_text_pipeline_collect_vertex_data (GskVulkanTextPipeline  *pipeline,
+                                              guchar                 *data,
+                                              GskVulkanRenderer      *renderer,
+                                              const graphene_rect_t  *rect,
+                                              PangoFont              *font,
+                                              PangoGlyphString       *glyphs,
+                                              const GdkRGBA          *color,
+                                              float                   x,
+                                              float                   y)
+{
+  GskVulkanTextInstance *instances = (GskVulkanTextInstance *) data;
+  int i, count;
+  int x_position = 0;
+  float ink_rect_y;
+  float ink_rect_height;
+
+  /* XXX */
+  ink_rect_y = rect->origin.y - y;
+  ink_rect_height = rect->size.height;
+
+  count = 0;
+  for (i = 0; i < glyphs->num_glyphs; i++)
+    {
+      PangoGlyphInfo *gi = &glyphs->glyphs[i];
+
+      if (gi->glyph != PANGO_GLYPH_EMPTY)
+        {
+          double cx = (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
+          double cy = (double)(gi->geometry.y_offset) / PANGO_SCALE;
+
+          if (!(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG))
+            {
+              GskVulkanTextInstance *instance = &instances[count];
+
+              instance->rect[0] = x + cx;
+              instance->rect[1] = y + ink_rect_y + cy;
+              instance->rect[2] = (float)gi->geometry.width / PANGO_SCALE;
+              instance->rect[3] = ink_rect_height;
+              gsk_vulkan_renderer_get_glyph_coords (renderer, font, glyphs,
+                                                    gi->glyph,
+                                                    &instance->tex_rect[0],
+                                                    &instance->tex_rect[1],
+                                                    &instance->tex_rect[2],
+                                                    &instance->tex_rect[3]);
+              instance->color[0] = color->red;
+              instance->color[1] = color->green;
+              instance->color[2] = color->blue;
+              instance->color[3] = color->alpha;
+
+              count++;
+            }
+        }
+      x_position += gi->geometry.width;
+    }
+}
+
+gsize
+gsk_vulkan_text_pipeline_draw (GskVulkanTextPipeline *pipeline,
+                               VkCommandBuffer        command_buffer,
+                               gsize                  offset,
+                               gsize                  n_commands)
+{
+  vkCmdDraw (command_buffer,
+             6, n_commands,
+             0, offset);
+
+  return n_commands;
+}

gsk/gskvulkantextpipelineprivate.h

@@ -0,0 +1,39 @@
+#ifndef __GSK_VULKAN_TEXT_PIPELINE_PRIVATE_H__
+#define __GSK_VULKAN_TEXT_PIPELINE_PRIVATE_H__
+
+#include <graphene.h>
+
+#include "gskvulkanpipelineprivate.h"
+#include "gskvulkanrendererprivate.h"
+
+G_BEGIN_DECLS
+
+typedef struct _GskVulkanTextPipelineLayout GskVulkanTextPipelineLayout;
+
+#define GSK_TYPE_VULKAN_TEXT_PIPELINE (gsk_vulkan_text_pipeline_get_type ())
+
+G_DECLARE_FINAL_TYPE (GskVulkanTextPipeline, gsk_vulkan_text_pipeline, GSK, VULKAN_TEXT_PIPELINE, GskVulkanPipeline)
+
+GskVulkanPipeline *     gsk_vulkan_text_pipeline_new                   (GskVulkanPipelineLayout *       layout,
+                                                                        const char                     *shader_name,
+                                                                        VkRenderPass                    render_pass);
+
+gsize                   gsk_vulkan_text_pipeline_count_vertex_data     (GskVulkanTextPipeline         *pipeline,
+                                                                        int                            num_instances);
+void                    gsk_vulkan_text_pipeline_collect_vertex_data   (GskVulkanTextPipeline         *pipeline,
+                                                                        guchar                         *data,
+                                                                        GskVulkanRenderer              *renderer,
+                                                                        const graphene_rect_t          *rect,
+                                                                        PangoFont                      *font,
+                                                                        PangoGlyphString               *glyphs,
+                                                                        const GdkRGBA                  *color,
+                                                                        float                           x,
+                                                                        float                           y);
+gsize                   gsk_vulkan_text_pipeline_draw                  (GskVulkanTextPipeline         *pipeline,
+                                                                        VkCommandBuffer                 command_buffer,
+                                                                        gsize                           offset,
+                                                                        gsize                           n_commands);
+
+G_END_DECLS
+
+#endif /* __GSK_VULKAN_TEXT_PIPELINE_PRIVATE_H__ */

gsk/meson.build

@@ -61,10 +61,12 @@ if have_vulkan
     'gskvulkanbuffer.c',
     'gskvulkanclip.c',
     'gskvulkancolorpipeline.c',
+    'gskvulkancolortextpipeline.c',
     'gskvulkancommandpool.c',
     'gskvulkaneffectpipeline.c',
     'gskvulkanlineargradientpipeline.c',
     'gskvulkanimage.c',
+    'gskvulkantextpipeline.c',
     'gskvulkanmemory.c',
     'gskvulkanpipeline.c',
     'gskvulkanpushconstants.c',

gsk/resources/vulkan/mask.frag

@@ -0,0 +1,16 @@
+#version 420 core
+
+#include "clip.frag.glsl"
+
+layout(location = 0) in vec2 inPos;
+layout(location = 1) in vec2 inTexCoord;
+layout(location = 2) in vec4 inColor;
+
+layout(set = 0, binding = 0) uniform sampler2D inTexture;
+
+layout(location = 0) out vec4 color;
+
+void main()
+{
+  color = clip (inPos, vec4(inColor.rgb, texture(inTexture, inTexCoord).a));
+}

gsk/resources/vulkan/mask.vert

@@ -0,0 +1,38 @@
+#version 420 core
+
+#include "clip.vert.glsl"
+
+layout(location = 0) in vec4 inRect;
+layout(location = 1) in vec4 inTexRect;
+layout(location = 2) in vec4 inColor;
+
+layout(location = 0) out vec2 outPos;
+layout(location = 1) out vec2 outTexCoord;
+layout(location = 2) out flat vec4 outColor;
+
+out gl_PerVertex {
+  vec4 gl_Position;
+};
+
+vec2 offsets[6] = { vec2(0.0, 0.0),
+                    vec2(1.0, 0.0),
+                    vec2(0.0, 1.0),
+                    vec2(0.0, 1.0),
+                    vec2(1.0, 0.0),
+                    vec2(1.0, 1.0) };
+
+void main() {
+  vec4 rect = clip (inRect);
+  vec2 pos = rect.xy + rect.zw * offsets[gl_VertexIndex];
+  gl_Position = push.mvp * vec4 (pos, 0.0, 1.0);
+
+  outPos = pos;
+
+  vec4 texrect = vec4((rect.xy - inRect.xy) / inRect.zw,
+                      rect.zw / inRect.zw);
+  texrect = vec4(inTexRect.xy + inTexRect.zw * texrect.xy,
+                 inTexRect.zw * texrect.zw);
+  outTexCoord = texrect.xy + texrect.zw * offsets[gl_VertexIndex];
+
+  outColor = inColor;
+}

gsk/resources/vulkan/meson.build

@@ -14,6 +14,7 @@ gsk_private_vulkan_fragment_shaders = [
   'color-matrix.frag',
   'inset-shadow.frag',
   'linear.frag',
+  'mask.frag',
   'outset-shadow.frag',
 ]
 
@@ -25,6 +26,7 @@ gsk_private_vulkan_vertex_shaders = [
   'color-matrix.vert',
   'inset-shadow.vert',
   'linear.vert',
+  'mask.vert',
   'outset-shadow.vert',
 ]
 

gtk/gskpango.c

@@ -112,8 +112,6 @@ gsk_pango_renderer_show_text_glyphs (PangoRenderer        *renderer,
                                      int                   y)
 {
   GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
-  double base_x = (double)x / PANGO_SCALE;
-  double base_y = (double)y / PANGO_SCALE;
   int x_offset, y_offset;
   GskRenderNode *node;
   GdkRGBA color;
@@ -121,7 +119,7 @@ gsk_pango_renderer_show_text_glyphs (PangoRenderer        *renderer,
   gtk_snapshot_get_offset (crenderer->snapshot, &x_offset, &y_offset);
   get_color (crenderer, PANGO_RENDER_PART_FOREGROUND, &color);
 
-  node = gsk_text_node_new (font, glyphs, &color, x_offset, y_offset, base_x, base_y);
+  node = gsk_text_node_new (font, glyphs, &color, x_offset + (double)x/PANGO_SCALE, y_offset + (double)y/PANGO_SCALE);
   if (node == NULL)
     return;
 
@@ -132,12 +130,8 @@ gsk_pango_renderer_show_text_glyphs (PangoRenderer        *renderer,
       gsk_render_node_set_name (node, name);
     }
 
-  gtk_snapshot_offset (crenderer->snapshot, base_x, base_y);
-
   gtk_snapshot_append_node (crenderer->snapshot, node);
   gsk_render_node_unref (node);
-
-  gtk_snapshot_offset (crenderer->snapshot, -base_x, -base_y);
 }
 
 static void