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gsk: Drop render buffer code path from GskGLRenderer

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We always use texturing, to preserve the alpha channel when blitting the
frame buffer object on the window surface.
This commit is contained in:
Emmanuele Bassi 2016-07-19 14:34:24 +01:00
parent b169ce374e
commit db4ade48e9
1 changed files with 4 additions and 46 deletions
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50
gsk/gskglrenderer.c
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@ -82,7 +82,6 @@ struct _GskGLRenderer
graphene_frustum_t frustum;
guint frame_buffer;
guint render_buffer;
guint depth_stencil_buffer;
guint texture_id;
@ -105,7 +104,6 @@ struct _GskGLRenderer
GArray *transparent_render_items;
gboolean has_buffers : 1;
gboolean has_alpha : 1;
gboolean has_stencil_buffer : 1;
gboolean has_depth_buffer : 1;
};
@ -137,28 +135,8 @@ gsk_gl_renderer_create_buffers (GskGLRenderer *self)
glGenFramebuffersEXT (1, &self->frame_buffer);
if (gsk_renderer_get_use_alpha (GSK_RENDERER (self)))
{
if (self->texture_id == 0)
glGenTextures (1, &self->texture_id);
if (self->render_buffer != 0)
{
glDeleteRenderbuffersEXT (1, &self->render_buffer);
self->render_buffer = 0;
}
}
else
{
if (self->render_buffer == 0)
glGenRenderbuffersEXT (1, &self->render_buffer);
if (self->texture_id != 0)
{
glDeleteTextures (1, &self->texture_id);
self->texture_id = 0;
}
}
if (self->texture_id == 0)
glGenTextures (1, &self->texture_id);
if (self->has_depth_buffer || self->has_stencil_buffer)
{
@ -203,12 +181,6 @@ gsk_gl_renderer_allocate_buffers (GskGLRenderer *self,
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
}
if (self->render_buffer != 0)
{
glBindRenderbuffer (GL_RENDERBUFFER, self->render_buffer);
glRenderbufferStorage (GL_RENDERBUFFER, GL_RGB8, width, height);
}
if (self->has_depth_buffer || self->has_stencil_buffer)
{
glBindRenderbuffer (GL_RENDERBUFFER, self->depth_stencil_buffer);
@ -234,11 +206,6 @@ gsk_gl_renderer_attach_buffers (GskGLRenderer *self)
glFramebufferTexture2D (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, self->texture_id, 0);
}
else if (self->render_buffer != 0)
{
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, self->render_buffer);
}
if (self->depth_stencil_buffer != 0)
{
@ -277,12 +244,6 @@ gsk_gl_renderer_destroy_buffers (GskGLRenderer *self)
self->depth_stencil_buffer = 0;
}
if (self->render_buffer != 0)
{
glDeleteRenderbuffersEXT (1, &self->render_buffer);
self->render_buffer = 0;
}
if (self->texture_id != 0)
{
glDeleteTextures (1, &self->texture_id);
@ -815,7 +776,6 @@ gsk_gl_renderer_render (GskRenderer *renderer,
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
graphene_matrix_t modelview, projection;
graphene_rect_t viewport;
gboolean use_alpha;
int status;
guint i;
guint64 gpu_time;
@ -898,12 +858,10 @@ gsk_gl_renderer_render (GskRenderer *renderer,
GSK_NOTE (OPENGL, g_print ("GPU time: %" G_GUINT64_FORMAT " nsec\n", gpu_time));
out:
use_alpha = gsk_renderer_get_use_alpha (renderer);
gdk_cairo_draw_from_gl (gdk_drawing_context_get_cairo_context (context),
gdk_drawing_context_get_window (context),
use_alpha ? self->texture_id : self->render_buffer,
use_alpha ? GL_TEXTURE : GL_RENDERBUFFER,
self->texture_id,
GL_TEXTURE,
gsk_renderer_get_scale_factor (renderer),
0, 0, viewport.size.width, viewport.size.height);