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Author SHA1 Message Date
Emmanuele Bassi
ddf3395c6e gdk: Add GL drawing to GdkDrawingContext
Similar to gdk_cairo_draw_from_gl(), but using a GdkDrawingContext.

The newly added function does not have a fallback path that reads back
from the GL object and uploads to an intermediate Cairo surface because
the GdkDrawingContext is associated to a top level window, instead of a
being a Cairo context in the middle of a group.
2016-06-22 18:41:57 +01:00
2 changed files with 442 additions and 271 deletions

View File

@@ -47,6 +47,12 @@ gboolean gdk_drawing_context_is_valid (GdkDrawingContext *cont
GDK_AVAILABLE_IN_3_22
cairo_t * gdk_drawing_context_get_cairo_context (GdkDrawingContext *context);
GDK_AVAILABLE_IN_3_22
void gdk_drawing_context_draw_from_gl (GdkDrawingContext *context,
int gl_object_type,
int gl_object,
int scale_factor,
cairo_region_t *clip_region);
G_END_DECLS

View File

@@ -295,9 +295,374 @@ gdk_gl_texture_quads (GdkGLContext *paint_context,
coordinate space, and its top left corner is drawn at the current
position according to the cairo translation. */
static void
gdk_gl_blit_render_buffer (GdkWindow *window,
GdkGLContext *paint_context,
cairo_region_t *clip_region,
int dest_offset_x,
int dest_offset_y,
int gl_buffer_id,
int buffer_scale,
const cairo_rectangle_int_t *buffer_rect)
{
GdkGLContextPaintData *paint_data;
int framebuffer;
int unscaled_window_height;
int window_scale;
int i;
paint_data = gdk_gl_context_get_paint_data (paint_context);
window_scale = gdk_window_get_scale_factor (window);
/* Translate region to offset coordinates */
cairo_region_translate (clip_region, dest_offset_x, dest_offset_y);
/* Create a framebuffer with the source renderbuffer and
* make it the current target for reads
*/
framebuffer = paint_data->tmp_framebuffer;
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT,
gl_buffer_id);
glBindFramebufferEXT (GL_DRAW_FRAMEBUFFER_EXT, 0);
glEnable (GL_SCISSOR_TEST);
gdk_window_get_unscaled_size (window, NULL, &unscaled_window_height);
/* We can use glDrawBuffer on OpenGL only; on GLES 2.0 we are already
* double buffered so we don't need it...
*/
if (!gdk_gl_context_get_use_es (paint_context))
{
glDrawBuffer (GL_BACK);
}
else
{
int maj, min;
gdk_gl_context_get_version (paint_context, &maj, &min);
/* ... but on GLES 3.0 we can use the vectorized glDrawBuffers
* call.
*/
if ((maj * 100 + min) >= 300)
{
static const GLenum buffers[] = { GL_BACK };
glDrawBuffers (G_N_ELEMENTS (buffers), buffers);
}
}
#define FLIP_Y(_y) (unscaled_window_height - (_y))
for (i = 0; i < cairo_region_num_rectangles (clip_region); i++)
{
cairo_rectangle_int_t clip_rect, dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
glScissor (clip_rect.x,
FLIP_Y (clip_rect.y + clip_rect.height),
clip_rect.width,
clip_rect.height);
dest.x = dest_offset_x;
dest.y = dest_offset_y;
dest.width = buffer_rect->width * window_scale / buffer_scale;
dest.height = buffer_rect->height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = buffer_rect->x + (dest.x - dest_offset_x * window_scale);
int clipped_src_y = buffer_rect->y + (buffer_rect->height - dest.height - (dest.y - dest_offset_y * window_scale));
glBlitFramebufferEXT (clipped_src_x,
clipped_src_y,
(clipped_src_x + dest.width),
(clipped_src_y + dest.height),
dest.x, FLIP_Y (dest.y + dest.height),
dest.x + dest.width, FLIP_Y (dest.y),
GL_COLOR_BUFFER_BIT, GL_NEAREST);
if (window->current_paint.flushed_region != NULL)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1)
/ window_scale
- flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1)
/ window_scale
- flushed_rect.y;
cairo_region_union_rectangle (window->current_paint.flushed_region, &flushed_rect);
cairo_region_subtract_rectangle (window->current_paint.need_blend_region, &flushed_rect);
}
}
}
glDisable (GL_SCISSOR_TEST);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
#undef FLIP_Y
}
static void
gdk_gl_blit_texture (GdkWindow *window,
GdkGLContext *paint_context,
cairo_region_t *clip_region,
int dest_offset_x,
int dest_offset_y,
int gl_buffer_id,
int buffer_scale,
gboolean use_alpha,
const cairo_rectangle_int_t *buffer_rect)
{
int unscaled_window_height;
int window_scale;
GLint texture_width;
GLint texture_height;
int i, n_rects, n_quads;
GdkTexturedQuad *quads;
cairo_rectangle_int_t clip_rect;
cairo_region_translate (clip_region, dest_offset_x, dest_offset_y);
if (use_alpha)
{
cairo_region_t *opaque_region, *blend_region;
opaque_region = cairo_region_copy (clip_region);
cairo_region_subtract (opaque_region, window->current_paint.flushed_region);
cairo_region_subtract (opaque_region, window->current_paint.need_blend_region);
if (!cairo_region_is_empty (opaque_region))
gdk_gl_texture_from_surface (window->current_paint.surface, opaque_region);
blend_region = cairo_region_copy (clip_region);
cairo_region_intersect (blend_region, window->current_paint.need_blend_region);
glEnable (GL_BLEND);
if (!cairo_region_is_empty (blend_region))
gdk_gl_texture_from_surface (window->current_paint.surface, blend_region);
cairo_region_destroy (opaque_region);
cairo_region_destroy (blend_region);
}
glBindTexture (GL_TEXTURE_2D, gl_buffer_id);
/* GLES does not have glGetTexLevelParameteriv()
* so we draw the whole buffer
*/
if (gdk_gl_context_get_use_es (paint_context))
{
texture_width = buffer_rect->width;
texture_height = buffer_rect->height;
}
else
{
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texture_width);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texture_height);
}
/* We always use nearest-neighbor because we're rendering 1:1 */
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable (GL_SCISSOR_TEST);
window_scale = gdk_window_get_scale_factor (window);
gdk_window_get_unscaled_size (window, NULL, &unscaled_window_height);
#define FLIP_Y(_y) (unscaled_window_height - (_y))
cairo_region_get_extents (clip_region, &clip_rect);
glScissor (clip_rect.x * window_scale,
FLIP_Y ((clip_rect.y + clip_rect.height) * window_scale),
clip_rect.width * window_scale,
clip_rect.height * window_scale);
n_quads = 0;
n_rects = cairo_region_num_rectangles (clip_region);
quads = g_newa (GdkTexturedQuad, n_rects);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
dest.x = dest_offset_x * window_scale;
dest.y = dest_offset_y * window_scale;
dest.width = buffer_rect->width * window_scale / buffer_scale;
dest.height = buffer_rect->height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = buffer_rect->x + (dest.x - dest_offset_x * window_scale);
int clipped_src_y = buffer_rect->y + (buffer_rect->height - dest.height - (dest.y - dest_offset_y * window_scale));
GdkTexturedQuad quad = {
dest.x, FLIP_Y (dest.y),
dest.x + dest.width, FLIP_Y (dest.y + dest.height),
clipped_src_x / (float)texture_width,
(clipped_src_y + dest.height) / (float)texture_height,
(clipped_src_x + dest.width) / (float)texture_width,
clipped_src_y / (float)texture_height,
};
quads[n_quads++] = quad;
if (window->current_paint.flushed_region)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1) / window_scale - flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1) / window_scale - flushed_rect.y;
cairo_region_union_rectangle (window->current_paint.flushed_region, &flushed_rect);
cairo_region_subtract_rectangle (window->current_paint.need_blend_region, &flushed_rect);
}
}
}
if (n_quads > 0)
gdk_gl_texture_quads (paint_context, GL_TEXTURE_2D, n_quads, quads, FALSE);
if (use_alpha != 0)
glDisable (GL_BLEND);
#undef FLIP_Y
}
/**
* gdk_drawing_context_draw_gl_buffer:
* @context: a #GdkDrawingContext
* @gl_buffer_type: the type of GL buffer to draw, for instance GL_RENDERBUFFER
* or GL_TEXTURE_2D
* @gl_buffer_id: the id of the GL buffer
* @buffer_scale: the scale factor used to draw on the GL buffer
* @rectangle: the rectangular region of the buffer to draw
*
* Draws the contents of a GL buffer, defined by the given @rectangle,
* on the #GdkDrawingContext.
*
* Unlike gdk_cairo_draw_from_gl() this function only works on #GdkDrawingContext
* instances, and does not provide a software fallback.
*
* Since: 3.22
*/
void
gdk_drawing_context_draw_gl_buffer (GdkDrawingContext *context,
int gl_buffer_type,
int gl_buffer_id,
int buffer_scale,
const cairo_rectangle_int_t *rectangle)
{
GdkGLContextPaintData *paint_data;
GdkWindow *window, *impl_window;
GdkGLContext *paint_context;
cairo_region_t *clip_region;
int alpha_size;
g_return_if_fail (GDK_IS_DRAWING_CONTEXT (context));
g_return_if_fail (rectangle != NULL);
window = gdk_drawing_context_get_window (context);
if (window == NULL)
return;
paint_context = gdk_window_get_paint_gl_context (window, NULL);
if (paint_context == NULL)
{
g_critical ("No GL context available.");
return;
}
clip_region = gdk_drawing_context_get_clip (context);
impl_window = window->impl_window;
gdk_gl_context_make_current (paint_context);
paint_data = gdk_gl_context_get_paint_data (paint_context);
if (paint_data->tmp_framebuffer == 0)
glGenFramebuffersEXT (1, &paint_data->tmp_framebuffer);
switch (gl_buffer_type)
{
case GL_RENDERBUFFER:
glBindRenderbuffer (GL_RENDERBUFFER, gl_buffer_id);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
break;
case GL_TEXTURE:
glBindTexture (GL_TEXTURE_2D, gl_buffer_id);
if (gdk_gl_context_get_use_es (paint_context))
alpha_size = 1;
else
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alpha_size);
break;
default:
g_warn_if_reached ();
return;
}
/* For direct paint of non-alpha renderbuffer, we can just do a bitblit */
if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
gl_buffer_type == GL_RENDERBUFFER &&
alpha_size == 0 &&
impl_window->current_paint.use_gl &&
clip_region != NULL)
{
gdk_gl_blit_render_buffer (impl_window, paint_context, clip_region,
0, 0,
gl_buffer_id,
buffer_scale,
rectangle);
return;
}
/* For direct paint of alpha or non-alpha textures we can use texturing */
if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
gl_buffer_type == GL_TEXTURE &&
window->current_paint.use_gl &&
clip_region != NULL)
{
gdk_gl_blit_texture (impl_window, paint_context, clip_region,
0, 0,
gl_buffer_id,
buffer_scale,
alpha_size != 0,
rectangle);
return;
}
}
/**
* gdk_cairo_draw_from_gl:
* @cr: a cairo context
* @cr: a Cairo context
* @window: The window we're rendering for (not necessarily into)
* @source: The GL ID of the source buffer
* @source_type: The type of the @source
@@ -307,16 +672,19 @@ gdk_gl_texture_quads (GdkGLContext *paint_context,
* @width: The width of the region to draw
* @height: The height of the region to draw
*
* This is the main way to draw GL content in GTK+. It takes a render buffer ID
* (@source_type == #GL_RENDERBUFFER) or a texture id (@source_type == #GL_TEXTURE)
* and draws it onto @cr with an OVER operation, respecting the current clip.
* The top left corner of the rectangle specified by @x, @y, @width and @height
* will be drawn at the current (0,0) position of the cairo_t.
* Renders the content of a GL texture or render buffer into a Cairo context
* associated with the given #GdkWindow.
*
* This will work for *all* cairo_t, as long as @window is realized, but the
* fallback implementation that reads back the pixels from the buffer may be
* used in the general case. In the case of direct drawing to a window with
* no special effects applied to @cr it will however use a more efficient
* This function takes a render buffer ID (@source_type == #GL_RENDERBUFFER)
* or a texture id (@source_type == #GL_TEXTURE) and draws it onto @cr with
* an OVER operation, respecting the current clip. The top left corner of the
* rectangle specified by @x, @y, @width and @height will be drawn at the
* current (0,0) position of the Cairo context.
*
* This will work for *all* Cairo contexts, as long as @window is realized,
* but the fallback implementation that reads back the pixels from the buffer
* may be used in the general case. In the case of direct drawing to a window
* with no special effects applied to @cr it will however use a more efficient
* approach.
*
* For #GL_RENDERBUFFER the code will always fall back to software for buffers
@@ -327,20 +695,20 @@ gdk_gl_texture_quads (GdkGLContext *paint_context,
* Since: 3.16
*/
void
gdk_cairo_draw_from_gl (cairo_t *cr,
GdkWindow *window,
int source,
int source_type,
int buffer_scale,
int x,
int y,
int width,
int height)
gdk_cairo_draw_from_gl (cairo_t *cr,
GdkWindow *window,
int source,
int source_type,
int buffer_scale,
int x,
int y,
int width,
int height)
{
GdkGLContext *paint_context;
cairo_surface_t *image;
cairo_matrix_t matrix;
int dx, dy, window_scale;
int dx, dy;
gboolean trivial_transform;
cairo_surface_t *group_target;
GdkWindow *direct_window, *impl_window;
@@ -351,43 +719,8 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
impl_window = window->impl_window;
window_scale = gdk_window_get_scale_factor (impl_window);
paint_context = gdk_window_get_paint_gl_context (window, NULL);
if (paint_context == NULL)
{
g_warning ("gdk_cairo_draw_gl_render_buffer failed - no paint context");
return;
}
clip_region = gdk_cairo_region_from_clip (cr);
gdk_gl_context_make_current (paint_context);
paint_data = gdk_gl_context_get_paint_data (paint_context);
if (paint_data->tmp_framebuffer == 0)
glGenFramebuffersEXT (1, &paint_data->tmp_framebuffer);
if (source_type == GL_RENDERBUFFER)
{
glBindRenderbuffer (GL_RENDERBUFFER, source);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
}
else if (source_type == GL_TEXTURE)
{
glBindTexture (GL_TEXTURE_2D, source);
if (gdk_gl_context_get_use_es (paint_context))
alpha_size = 1;
else
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alpha_size);
}
else
{
g_warning ("Unsupported gl source type %d\n", source_type);
return;
}
group_target = cairo_get_group_target (cr);
direct_window = cairo_surface_get_user_data (group_target, &direct_key);
@@ -402,8 +735,39 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
matrix.xx == 1.0 && matrix.xy == 0.0 &&
matrix.yx == 0.0 && matrix.yy == 1.0;
/* For direct paint of non-alpha renderbuffer, we can
just do a bitblit */
paint_context = gdk_window_get_paint_gl_context (window, NULL);
if (paint_context == NULL)
{
g_critical ("No GL context available.");
return;
}
gdk_gl_context_make_current (paint_context);
paint_data = gdk_gl_context_get_paint_data (paint_context);
if (paint_data->tmp_framebuffer == 0)
glGenFramebuffersEXT (1, &paint_data->tmp_framebuffer);
switch (source_type)
{
case GL_RENDERBUFFER:
glBindRenderbuffer (GL_RENDERBUFFER, source);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
break;
case GL_TEXTURE:
glBindTexture (GL_TEXTURE_2D, source);
if (gdk_gl_context_get_use_es (paint_context))
alpha_size = 1;
else
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alpha_size);
break;
default:
g_warn_if_reached ();
return;
}
if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_RENDERBUFFER &&
alpha_size == 0 &&
@@ -412,100 +776,15 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
trivial_transform &&
clip_region != NULL)
{
int unscaled_window_height;
int i;
/* Create a framebuffer with the source renderbuffer and
make it the current target for reads */
framebuffer = paint_data->tmp_framebuffer;
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, source);
glBindFramebufferEXT (GL_DRAW_FRAMEBUFFER_EXT, 0);
/* Translate to impl coords */
cairo_region_translate (clip_region, dx, dy);
glEnable (GL_SCISSOR_TEST);
gdk_window_get_unscaled_size (impl_window, NULL, &unscaled_window_height);
/* We can use glDrawBuffer on OpenGL only; on GLES 2.0 we are already
* double buffered so we don't need it...
*/
if (!gdk_gl_context_get_use_es (paint_context))
glDrawBuffer (GL_BACK);
else
{
int maj, min;
gdk_gl_context_get_version (paint_context, &maj, &min);
/* ... but on GLES 3.0 we can use the vectorized glDrawBuffers
* call.
*/
if ((maj * 100 + min) >= 300)
{
static const GLenum buffers[] = { GL_BACK };
glDrawBuffers (G_N_ELEMENTS (buffers), buffers);
}
}
#define FLIP_Y(_y) (unscaled_window_height - (_y))
for (i = 0; i < cairo_region_num_rectangles (clip_region); i++)
{
cairo_rectangle_int_t clip_rect, dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
glScissor (clip_rect.x, FLIP_Y (clip_rect.y + clip_rect.height),
clip_rect.width, clip_rect.height);
dest.x = dx * window_scale;
dest.y = dy * window_scale;
dest.width = width * window_scale / buffer_scale;
dest.height = height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = x + (dest.x - dx * window_scale);
int clipped_src_y = y + (height - dest.height - (dest.y - dy * window_scale));
glBlitFramebufferEXT(clipped_src_x, clipped_src_y,
(clipped_src_x + dest.width), (clipped_src_y + dest.height),
dest.x, FLIP_Y(dest.y + dest.height),
dest.x + dest.width, FLIP_Y(dest.y),
GL_COLOR_BUFFER_BIT, GL_NEAREST);
if (impl_window->current_paint.flushed_region)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1) / window_scale - flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1) / window_scale - flushed_rect.y;
cairo_region_union_rectangle (impl_window->current_paint.flushed_region,
&flushed_rect);
cairo_region_subtract_rectangle (impl_window->current_paint.need_blend_region,
&flushed_rect);
}
}
}
glDisable (GL_SCISSOR_TEST);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
#undef FLIP_Y
cairo_rectangle_int_t rect = { x, y, width, height };
/* For direct paint of non-alpha renderbuffer, we can just do a bitblit */
gdk_gl_blit_render_buffer (impl_window, paint_context, clip_region,
dx, dy,
source,
buffer_scale,
&rect);
}
/* For direct paint of alpha or non-alpha textures we can use texturing */
else if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_TEXTURE &&
direct_window != NULL &&
@@ -513,128 +792,15 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
trivial_transform &&
clip_region != NULL)
{
int unscaled_window_height;
GLint texture_width;
GLint texture_height;
int i, n_rects, n_quads;
GdkTexturedQuad *quads;
cairo_rectangle_int_t clip_rect;
/* Translate to impl coords */
cairo_region_translate (clip_region, dx, dy);
if (alpha_size != 0)
{
cairo_region_t *opaque_region, *blend_region;
opaque_region = cairo_region_copy (clip_region);
cairo_region_subtract (opaque_region, impl_window->current_paint.flushed_region);
cairo_region_subtract (opaque_region, impl_window->current_paint.need_blend_region);
if (!cairo_region_is_empty (opaque_region))
gdk_gl_texture_from_surface (impl_window->current_paint.surface,
opaque_region);
blend_region = cairo_region_copy (clip_region);
cairo_region_intersect (blend_region, impl_window->current_paint.need_blend_region);
glEnable (GL_BLEND);
if (!cairo_region_is_empty (blend_region))
gdk_gl_texture_from_surface (impl_window->current_paint.surface,
blend_region);
cairo_region_destroy (opaque_region);
cairo_region_destroy (blend_region);
}
glBindTexture (GL_TEXTURE_2D, source);
if (gdk_gl_context_get_use_es (paint_context))
{
texture_width = width;
texture_height = height;
}
else
{
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texture_width);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texture_height);
}
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable (GL_SCISSOR_TEST);
gdk_window_get_unscaled_size (impl_window, NULL, &unscaled_window_height);
#define FLIP_Y(_y) (unscaled_window_height - (_y))
cairo_region_get_extents (clip_region, &clip_rect);
glScissor (clip_rect.x * window_scale, FLIP_Y ((clip_rect.y + clip_rect.height) * window_scale),
clip_rect.width * window_scale, clip_rect.height * window_scale);
n_quads = 0;
n_rects = cairo_region_num_rectangles (clip_region);
quads = g_new (GdkTexturedQuad, n_rects);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
dest.x = dx * window_scale;
dest.y = dy * window_scale;
dest.width = width * window_scale / buffer_scale;
dest.height = height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = x + (dest.x - dx * window_scale);
int clipped_src_y = y + (height - dest.height - (dest.y - dy * window_scale));
GdkTexturedQuad quad = {
dest.x, FLIP_Y(dest.y),
dest.x + dest.width, FLIP_Y(dest.y + dest.height),
clipped_src_x / (float)texture_width, (clipped_src_y + dest.height) / (float)texture_height,
(clipped_src_x + dest.width) / (float)texture_width, clipped_src_y / (float)texture_height,
};
quads[n_quads++] = quad;
if (impl_window->current_paint.flushed_region)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1) / window_scale - flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1) / window_scale - flushed_rect.y;
cairo_region_union_rectangle (impl_window->current_paint.flushed_region,
&flushed_rect);
cairo_region_subtract_rectangle (impl_window->current_paint.need_blend_region,
&flushed_rect);
}
}
}
if (n_quads > 0)
gdk_gl_texture_quads (paint_context, GL_TEXTURE_2D, n_quads, quads, FALSE);
g_free (quads);
if (alpha_size != 0)
glDisable (GL_BLEND);
#undef FLIP_Y
cairo_rectangle_int_t rect = { x, y, width, height };
/* For direct paint of alpha or non-alpha textures we can use texturing */
gdk_gl_blit_texture (impl_window, paint_context, clip_region,
dx, dy,
source,
buffer_scale,
alpha_size != 0,
&rect);
}
else
{
@@ -705,7 +871,6 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
out:
if (clip_region)
cairo_region_destroy (clip_region);
}
/* This is always called with the paint context current */