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GdkGL: Fix and clean up gdk_cairo_draw_from_gl()

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This was unnecessarily creating a framebuffer in the texture case,
and it was not properly setting up a framebuffer with the texture
as source in the software fallback w/ texture source case.
This commit is contained in:
Alexander Larsson 2014-11-05 09:52:51 +01:00
parent c41231cc0f
commit e4bf60224b
1 changed files with 31 additions and 16 deletions
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47
gdk/gdkgl.c
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@ -105,25 +105,16 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
gdk_gl_context_make_current (context);
glGenFramebuffersEXT (1, &framebuffer);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
if (source_type == GL_RENDERBUFFER)
{
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, source);
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, source);
glBindFramebufferEXT (GL_DRAW_FRAMEBUFFER_EXT, 0);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
}
else if (source_type == GL_TEXTURE)
{
glBindTexture (GL_TEXTURE_2D, source);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alpha_size);
glBindFramebufferEXT (GL_DRAW_FRAMEBUFFER_EXT, 0);
}
else
{
@ -157,6 +148,14 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
int window_height;
int i;
/* Create a framebuffer with the source renderbuffer and
make it the current target for reads */
glGenFramebuffersEXT (1, &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);
@ -213,6 +212,9 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
glDisable (GL_SCISSOR_TEST);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT (1, &framebuffer);
#undef FLIP_Y
}
@ -351,6 +353,22 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
cairo_surface_set_device_scale (image, buffer_scale, buffer_scale);
#endif
glGenFramebuffersEXT (1, &framebuffer);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
if (source_type == GL_RENDERBUFFER)
{
/* Create a framebuffer with the source renderbuffer and
make it the current target for reads */
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, source);
}
else
{
glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, source, 0);
}
glPixelStorei (GL_PACK_ALIGNMENT, 4);
glPixelStorei (GL_PACK_ROW_LENGTH, cairo_image_surface_get_stride (image) / 4);
@ -359,6 +377,9 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
glPixelStorei (GL_PACK_ROW_LENGTH, 0);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT (1, &framebuffer);
cairo_surface_mark_dirty (image);
/* Invert due to opengl having different origin */
@ -372,12 +393,6 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
cairo_surface_destroy (image);
}
glDrawBuffer (GL_BACK);
glReadBuffer(GL_BACK);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT (1, &framebuffer);
if (clip_region)
cairo_region_destroy (clip_region);
}