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Use GL_OES_packed_depth_stencil on GLES2

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If the GL_OES_packed_depth_stencil extension is available then we can
try creating a combined depth-stencil buffer with the
GL_DEPTH24_STENCIL8 format. This adds a private flag for the feature.

https://bugzilla.gnome.org/show_bug.cgi?id=666184

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2012-02-22 17:02:28 +00:00
parent b52d24c933
commit 31bd4cb22c
3 changed files with 21 additions and 7 deletions
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20
cogl/cogl-framebuffer.c
View File

@ -65,6 +65,9 @@
#ifndef GL_DEPTH_STENCIL
#define GL_DEPTH_STENCIL 0x84F9
#endif
#ifndef GL_DEPTH24_STENCIL8
#define GL_DEPTH24_STENCIL8 0x88F0
#endif
#ifndef GL_DEPTH_ATTACHMENT
#define GL_DEPTH_ATTACHMENT 0x8D00
#endif
@ -101,8 +104,9 @@
typedef enum {
_TRY_DEPTH_STENCIL = 1L<<0,
_TRY_DEPTH = 1L<<1,
_TRY_STENCIL = 1L<<2
_TRY_DEPTH24_STENCIL8 = 1L<<1,
_TRY_DEPTH = 1L<<2,
_TRY_STENCIL = 1L<<3
} TryFBOFlags;
typedef struct _CoglFramebufferStackEntry
@ -868,18 +872,21 @@ try_creating_fbo (CoglOffscreen *offscreen,
tex_gl_target, tex_gl_handle,
offscreen->texture_level));
if (flags & _TRY_DEPTH_STENCIL)
if (flags & (_TRY_DEPTH_STENCIL | _TRY_DEPTH24_STENCIL8))
{
GLenum format = ((flags & _TRY_DEPTH_STENCIL) ?
GL_DEPTH_STENCIL : GL_DEPTH24_STENCIL8);
/* Create a renderbuffer for depth and stenciling */
GE (ctx, glGenRenderbuffers (1, &gl_depth_stencil_handle));
GE (ctx, glBindRenderbuffer (GL_RENDERBUFFER, gl_depth_stencil_handle));
if (n_samples)
GE (ctx, glRenderbufferStorageMultisampleIMG (GL_RENDERBUFFER,
n_samples,
GL_DEPTH_STENCIL,
format,
width, height));
else
GE (ctx, glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_STENCIL,
GE (ctx, glRenderbufferStorage (GL_RENDERBUFFER, format,
width, height));
GE (ctx, glBindRenderbuffer (GL_RENDERBUFFER, 0));
GE (ctx, glFramebufferRenderbuffer (GL_FRAMEBUFFER,
@ -1009,6 +1016,9 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
((ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL) &&
try_creating_fbo (offscreen, flags = _TRY_DEPTH_STENCIL)) ||
((ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL) &&
try_creating_fbo (offscreen, flags = _TRY_DEPTH24_STENCIL8)) ||
try_creating_fbo (offscreen, flags = _TRY_DEPTH | _TRY_STENCIL) ||
try_creating_fbo (offscreen, flags = _TRY_STENCIL) ||
try_creating_fbo (offscreen, flags = _TRY_DEPTH) ||

3
cogl/cogl-internal.h
View File

@ -106,7 +106,8 @@ typedef enum
COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES = 1L<<4,
COGL_PRIVATE_FEATURE_PBOS = 1L<<5,
COGL_PRIVATE_FEATURE_VBOS = 1L<<6,
COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL = 1L<<7
COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL = 1L<<7,
COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL = 1L<<8
} CoglPrivateFeatureFlags;
/* Sometimes when evaluating pipelines, either during comparisons or

3
cogl/driver/gles/cogl-gles.c
View File

@ -162,6 +162,9 @@ _cogl_gles_update_features (CoglContext *context,
if (context->glEGLImageTargetTexture2D)
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
if (_cogl_check_extension ("GL_OES_packed_depth_stencil", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL;
/* Cache features */
context->private_feature_flags |= private_flags;
context->feature_flags |= flags;