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framebuffer: Support texture based depth buffers

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This commit introduces some new framebuffer api to be able to
enable texture based depth buffers for a framebuffer (currently
only supported for offscreen framebuffers) and once allocated
to be able to retrieve the depth buffer as a texture for further
usage, say, to implement shadow mapping.

The API works as follow:
  * Before the framebuffer is allocated, you can request that a depth
    texture is created with
    cogl_framebuffer_set_depth_texture_enabled()
  * cogl_framebuffer_get_depth_texture() can then be used to grab a
    CoglTexture once the framebuffer has been allocated.
This commit is contained in:
Damien Lespiau 2012-05-23 18:19:29 +01:00 committed by Robert Bragg
parent 58bbf8499a
commit 87bc616d34
11 changed files with 319 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cogl/cogl-bitmap-conversion.c
View File

@ -306,6 +306,9 @@ _cogl_bitmap_needs_short_temp_buffer (CoglPixelFormat format)
floats */
switch (format)
{
case COGL_PIXEL_FORMAT_DEPTH_16:
case COGL_PIXEL_FORMAT_DEPTH_32:
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();

6
cogl/cogl-bitmap-packing.h
View File

@ -370,6 +370,9 @@ G_PASTE (_cogl_unpack_, component_type) (CoglPixelFormat format,
case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
G_PASTE (_cogl_unpack_abgr_2101010_, component_type) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
case COGL_PIXEL_FORMAT_DEPTH_32:
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();
@ -711,6 +714,9 @@ G_PASTE (_cogl_pack_, component_type) (CoglPixelFormat format,
case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
G_PASTE (_cogl_pack_abgr_2101010_, component_type) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
case COGL_PIXEL_FORMAT_DEPTH_32:
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();

4
cogl/cogl-context.h
View File

@ -206,7 +206,8 @@ cogl_is_context (void *object);
* for swap buffer completions.
* @COGL_FEATURE_ID_GLES2_CONTEXT: Whether creating new GLES2 contexts is
* suported.
*
* @COGL_FEATURE_ID_DEPTH_TEXTURE: Whether #CoglFramebuffer support rendering
* the depth buffer to a texture.
*
* All the capabilities that can vary between different GPUs supported
* by Cogl. Applications that depend on any of these features should explicitly
@ -235,6 +236,7 @@ typedef enum _CoglFeatureID
COGL_FEATURE_ID_MIRRORED_REPEAT,
COGL_FEATURE_ID_SWAP_BUFFERS_EVENT,
COGL_FEATURE_ID_GLES2_CONTEXT,
COGL_FEATURE_ID_DEPTH_TEXTURE,
/*< private > */
_COGL_N_FEATURE_IDS

4
cogl/cogl-framebuffer-private.h
View File

@ -53,6 +53,7 @@ typedef struct
CoglBool need_stencil;
int samples_per_pixel;
CoglBool swap_throttled;
CoglBool depth_texture_enabled;
} CoglFramebufferConfig;
/* Flags to pass to _cogl_offscreen_new_to_texture_full */
@ -190,6 +191,8 @@ struct _CoglOffscreen
int texture_level_width;
int texture_level_height;
CoglTexture *depth_texture;
CoglOffscreenAllocateFlags allocation_flags;
/* FIXME: _cogl_offscreen_new_to_texture_full should be made to use
@ -421,6 +424,7 @@ _cogl_framebuffer_try_creating_gl_fbo (CoglContext *ctx,
int texture_level,
int texture_level_width,
int texture_level_height,
CoglTexture *depth_texture,
CoglFramebufferConfig *config,
CoglOffscreenAllocateFlags flags,
CoglGLFramebuffer *gl_framebuffer);

170
cogl/cogl-framebuffer.c
View File

@ -817,9 +817,83 @@ _cogl_offscreen_free (CoglOffscreen *offscreen)
if (offscreen->texture != NULL)
cogl_object_unref (offscreen->texture);
if (offscreen->depth_texture != NULL)
cogl_object_unref (offscreen->depth_texture);
g_free (offscreen);
}
static CoglTexture *
create_depth_texture (CoglContext *ctx,
int width,
int height)
{
CoglPixelFormat format;
CoglTexture2D *depth_texture;
if (ctx->private_feature_flags &
(COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL |
COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL))
{
format = COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8;
}
else
format = COGL_PIXEL_FORMAT_DEPTH_16;
depth_texture = cogl_texture_2d_new_with_size (ctx,
width, height,
format,
NULL);
return COGL_TEXTURE (depth_texture);
}
static CoglTexture *
attach_depth_texture (CoglContext *ctx,
CoglTexture *depth_texture,
CoglOffscreenAllocateFlags flags)
{
GLuint tex_gl_handle;
GLenum tex_gl_target;
if (flags & COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_STENCIL)
{
/* attach a GL_DEPTH_STENCIL texture to the GL_DEPTH_ATTACHMENT and
* GL_STENCIL_ATTACHMENT attachement points */
g_assert (cogl_texture_get_format (depth_texture) ==
COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8);
cogl_texture_get_gl_texture (depth_texture,
&tex_gl_handle, &tex_gl_target);
GE (ctx, glFramebufferTexture2D (GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
tex_gl_target, tex_gl_handle,
0));
GE (ctx, glFramebufferTexture2D (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
tex_gl_target, tex_gl_handle,
0));
}
else if (flags & COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH)
{
/* attach a newly created GL_DEPTH_COMPONENT16 texture to the
* GL_DEPTH_ATTACHMENT attachement point */
g_assert (cogl_texture_get_format (depth_texture) ==
COGL_PIXEL_FORMAT_DEPTH_16);
cogl_texture_get_gl_texture (COGL_TEXTURE (depth_texture),
&tex_gl_handle, &tex_gl_target);
GE (ctx, glFramebufferTexture2D (GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
tex_gl_target, tex_gl_handle,
0));
}
return COGL_TEXTURE (depth_texture);
}
static GList *
try_creating_renderbuffers (CoglContext *ctx,
int width,
@ -937,6 +1011,7 @@ try_creating_fbo (CoglContext *ctx,
int texture_level,
int texture_level_width,
int texture_level_height,
CoglTexture *depth_texture,
CoglFramebufferConfig *config,
CoglOffscreenAllocateFlags flags,
CoglGLFramebuffer *gl_framebuffer)
@ -987,12 +1062,31 @@ try_creating_fbo (CoglContext *ctx,
tex_gl_target, tex_gl_handle,
texture_level));
gl_framebuffer->renderbuffers =
try_creating_renderbuffers (ctx,
texture_level_width,
texture_level_height,
flags,
n_samples);
/* attach either a depth/stencil texture, a depth texture or render buffers
* depending on what we've been asked to provide */
if (depth_texture &&
flags & (COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_STENCIL |
COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH))
{
attach_depth_texture (ctx, depth_texture, flags);
/* Let's clear the flags that are now fulfilled as we might need to
* create renderbuffers (for the ALLOCATE_FLAG_DEPTH |
* ALLOCATE_FLAG_STENCIL case) */
flags &= ~(COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_STENCIL |
COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH);
}
if (flags)
{
gl_framebuffer->renderbuffers =
try_creating_renderbuffers (ctx,
texture_level_width,
texture_level_height,
flags,
n_samples);
}
/* Make sure it's complete */
status = ctx->glCheckFramebufferStatus (GL_FRAMEBUFFER);
@ -1031,6 +1125,7 @@ _cogl_framebuffer_try_creating_gl_fbo (CoglContext *ctx,
int texture_level,
int texture_level_width,
int texture_level_height,
CoglTexture *depth_texture,
CoglFramebufferConfig *config,
CoglOffscreenAllocateFlags flags,
CoglGLFramebuffer *gl_framebuffer)
@ -1040,6 +1135,7 @@ _cogl_framebuffer_try_creating_gl_fbo (CoglContext *ctx,
texture_level,
texture_level_width,
texture_level_height,
depth_texture,
config,
flags,
gl_framebuffer);
@ -1054,6 +1150,24 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
CoglOffscreenAllocateFlags flags;
CoglGLFramebuffer *gl_framebuffer = &offscreen->gl_framebuffer;
if (fb->config.depth_texture_enabled &&
offscreen->depth_texture == NULL)
{
offscreen->depth_texture =
create_depth_texture (ctx,
offscreen->texture_level_width,
offscreen->texture_level_height);
if (offscreen->depth_texture)
_cogl_texture_associate_framebuffer (offscreen->depth_texture, fb);
else
{
g_set_error (error, COGL_FRAMEBUFFER_ERROR,
COGL_FRAMEBUFFER_ERROR_ALLOCATE,
"Failed to allocate depth texture for framebuffer");
}
}
/* XXX: The framebuffer_object spec isn't clear in defining whether attaching
* a texture as a renderbuffer with mipmap filtering enabled while the
* mipmaps have not been uploaded should result in an incomplete framebuffer
@ -1072,6 +1186,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = 0,
gl_framebuffer)) ||
@ -1082,6 +1197,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = ctx->last_offscreen_allocate_flags,
gl_framebuffer)) ||
@ -1094,6 +1210,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_STENCIL,
gl_framebuffer)) ||
@ -1103,6 +1220,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH |
COGL_OFFSCREEN_ALLOCATE_FLAG_STENCIL,
@ -1113,6 +1231,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = COGL_OFFSCREEN_ALLOCATE_FLAG_STENCIL,
gl_framebuffer) ||
@ -1122,6 +1241,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH,
gl_framebuffer) ||
@ -1131,6 +1251,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&fb->config,
flags = 0,
gl_framebuffer))
@ -1145,7 +1266,7 @@ _cogl_offscreen_allocate (CoglOffscreen *offscreen,
ctx->have_last_offscreen_allocate_flags = TRUE;
}
/* Save the flags we managed so successfully allocate the
/* Save the flags we managed to successfully allocate the
* renderbuffers with in case we need to make renderbuffers for a
* GLES2 context later */
offscreen->allocation_flags = flags;
@ -1173,6 +1294,15 @@ cogl_framebuffer_allocate (CoglFramebuffer *framebuffer,
if (framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
{
if (framebuffer->config.depth_texture_enabled)
{
g_set_error (error, COGL_FRAMEBUFFER_ERROR,
COGL_FRAMEBUFFER_ERROR_ALLOCATE,
"Can't allocate onscreen framebuffer with a "
"texture based depth buffer");
return FALSE;
}
if (!winsys->onscreen_init (onscreen, error))
return FALSE;
}
@ -1928,6 +2058,32 @@ cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer)
return framebuffer->format;
}
void
cogl_framebuffer_set_depth_texture_enabled (CoglFramebuffer *framebuffer,
CoglBool enabled)
{
_COGL_RETURN_IF_FAIL (!framebuffer->allocated);
framebuffer->config.depth_texture_enabled = enabled;
}
CoglBool
cogl_framebuffer_get_depth_texture_enabled (CoglFramebuffer *framebuffer)
{
return framebuffer->config.depth_texture_enabled;
}
CoglTexture *
cogl_framebuffer_get_depth_texture (CoglFramebuffer *framebuffer)
{
/* lazily allocate the framebuffer... */
if (!cogl_framebuffer_allocate (framebuffer, NULL))
return NULL;
_COGL_RETURN_VAL_IF_FAIL (cogl_is_offscreen (framebuffer), NULL);
return COGL_OFFSCREEN(framebuffer)->depth_texture;
}
int
cogl_framebuffer_get_samples_per_pixel (CoglFramebuffer *framebuffer)
{

60
cogl/cogl-framebuffer.h
View File

@ -46,6 +46,7 @@
#ifdef COGL_ENABLE_EXPERIMENTAL_API
#include <cogl/cogl-quaternion.h>
#include <cogl/cogl-euler.h>
#include <cogl/cogl-texture.h>
#endif
G_BEGIN_DECLS
@ -811,6 +812,65 @@ cogl_framebuffer_set_color_mask (CoglFramebuffer *framebuffer,
CoglPixelFormat
cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer);
/**
* cogl_framebuffer_set_depth_texture_enabled:
* @framebuffer: A #CoglFramebuffer
* @enabled: TRUE or FALSE
*
* If @enabled is #TRUE, the depth buffer used when rendering to @framebuffer
* is available as a texture. You can retrieve the texture with
* cogl_framebuffer_get_depth_texture().
*
* <note>It's possible that your GPU does not support depth textures. You
* should check the %COGL_FEATURE_ID_DEPTH_TEXTURE feature before using this
* function.</note>
* <note>It's not valid to call this function after the framebuffer has been
* allocated as the creation of the depth texture is done at allocation time.
* </note>
*
* Since: 1.14
* Stability: unstable
*/
void
cogl_framebuffer_set_depth_texture_enabled (CoglFramebuffer *framebuffer,
CoglBool enabled);
/**
* cogl_framebuffer_get_depth_texture_enabled:
* @framebuffer: A #CoglFramebuffer
*
* Queries whether texture based depth buffer has been enabled via
* cogl_framebuffer_set_depth_texture_enabled().
*
* Return value: %TRUE if a depth texture has been enabled, else
* %FALSE.
*
* Since: 1.14
* Stability: unstable
*/
CoglBool
cogl_framebuffer_get_depth_texture_enabled (CoglFramebuffer *framebuffer);
/**
* cogl_framebuffer_get_depth_texture:
* @framebuffer: A #CoglFramebuffer
*
* Retrieves the depth buffer of @framebuffer as a #CoglTexture. You need to
* call cogl_framebuffer_get_depth_texture(fb, TRUE); before using this
* function.
*
* <note>Calling this function implicitely allocates the framebuffer.</note>
* <note>The texture returned stays valid as long as the framebuffer stays
* valid.</note>
*
* Returns: (transfer none): the depth texture
*
* Since: 1.14
* Stability: unstable
*/
CoglTexture *
cogl_framebuffer_get_depth_texture (CoglFramebuffer *framebuffer);
/**
* cogl_framebuffer_set_samples_per_pixel:
* @framebuffer: A #CoglFramebuffer framebuffer

1
cogl/cogl-gles2-context.c
View File

@ -1722,6 +1722,7 @@ _cogl_gles2_offscreen_allocate (CoglOffscreen *offscreen,
offscreen->texture_level,
offscreen->texture_level_width,
offscreen->texture_level_height,
offscreen->depth_texture,
&COGL_FRAMEBUFFER (offscreen)->config,
offscreen->allocation_flags,
&gles2_offscreen->gl_framebuffer))

26
cogl/cogl-types.h
View File

@ -206,18 +206,22 @@ typedef struct _CoglTextureVertex CoglTextureVertex;
#define COGL_BGR_BIT (1 << 5)
#define COGL_AFIRST_BIT (1 << 6)
#define COGL_PREMULT_BIT (1 << 7)
#define COGL_DEPTH_BIT (1 << 8)
#define COGL_STENCIL_BIT (1 << 9)
/* XXX: Notes to those adding new formats here...
*
* First this diagram outlines how we allocate the 32bits of a
* CoglPixelFormat currently...
*
* 4 bits for flags
* |--|
* 6 bits for flags
* |-----|
* enum unused 4 bits for the bytes-per-pixel
* and component alignment info
* |------| |---------------| |--|
* 00000000 xxxxxxxx xxxxxxxx PFBA0000
* |------| |-------------| |--|
* 00000000 xxxxxxxx xxxxxxSD PFBA0000
* ^ stencil
* ^ depth
* ^ premult
* ^ alpha first
* ^ bgr order
@ -239,7 +243,7 @@ typedef struct _CoglTextureVertex CoglTextureVertex;
* 4-6 = 2 bpp, not aligned (e.g. 565, 4444, 5551)
* 7 = YUV: undefined bpp, undefined alignment
* 9 = 2 bpp, aligned
* 10 = undefined
* 10 = depth, aligned (8, 16, 24, 32, 32f)
* 11 = undefined
* 12 = 3 bpp, not aligned
* 13 = 4 bpp, not aligned (e.g. 2101010)
@ -357,7 +361,12 @@ typedef enum { /*< prefix=COGL_PIXEL_FORMAT >*/
COGL_PIXEL_FORMAT_RGBA_1010102_PRE = (COGL_PIXEL_FORMAT_RGBA_1010102 | COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_BGRA_1010102_PRE = (COGL_PIXEL_FORMAT_BGRA_1010102 | COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_ARGB_2101010_PRE = (COGL_PIXEL_FORMAT_ARGB_2101010 | COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_ABGR_2101010_PRE = (COGL_PIXEL_FORMAT_ABGR_2101010 | COGL_PREMULT_BIT)
COGL_PIXEL_FORMAT_ABGR_2101010_PRE = (COGL_PIXEL_FORMAT_ABGR_2101010 | COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_DEPTH_16 = (9 | COGL_DEPTH_BIT),
COGL_PIXEL_FORMAT_DEPTH_32 = (3 | COGL_DEPTH_BIT),
COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8 = (3 | COGL_DEPTH_BIT | COGL_STENCIL_BIT)
} CoglPixelFormat;
/**
@ -400,6 +409,8 @@ typedef enum { /*< prefix=COGL_PIXEL_FORMAT >*/
* supported with CoglBufferAccess including read support.
* @COGL_FEATURE_MAP_BUFFER_FOR_WRITE: Whether cogl_buffer_map() is
* supported with CoglBufferAccess including write support.
* @COGL_FEATURE_DEPTH_TEXTURE: Whether #CoglFramebuffer support rendering the
* depth buffer to a texture.
*
* Flags for the supported features.
*
@ -429,7 +440,8 @@ typedef enum
COGL_FEATURE_SHADERS_ARBFP = (1 << 20),
COGL_FEATURE_MAP_BUFFER_FOR_READ = (1 << 21),
COGL_FEATURE_MAP_BUFFER_FOR_WRITE = (1 << 22),
COGL_FEATURE_ONSCREEN_MULTIPLE = (1 << 23)
COGL_FEATURE_ONSCREEN_MULTIPLE = (1 << 23),
COGL_FEATURE_DEPTH_TEXTURE = (1 << 24)
} CoglFeatureFlags;
/**

24
cogl/driver/gl/cogl-gl.c
View File

@ -199,6 +199,23 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
gltype = GL_UNSIGNED_SHORT_5_5_5_1;
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
glintformat = GL_DEPTH_COMPONENT16;
glformat = GL_DEPTH_COMPONENT;
gltype = GL_UNSIGNED_SHORT;
break;
case COGL_PIXEL_FORMAT_DEPTH_32:
glintformat = GL_DEPTH_COMPONENT32;
glformat = GL_DEPTH_COMPONENT;
gltype = GL_UNSIGNED_INT;
break;
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
glintformat = GL_DEPTH_STENCIL;
glformat = GL_DEPTH_STENCIL;
gltype = GL_UNSIGNED_INT_24_8;
break;
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();
@ -403,6 +420,13 @@ _cogl_driver_update_features (CoglContext *ctx,
COGL_FEATURE_ID_OFFSCREEN_MULTISAMPLE, TRUE);
}
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 3, 0) ||
_cogl_check_extension ("GL_ARB_depth_texture", gl_extensions))
{
flags |= COGL_FEATURE_DEPTH_TEXTURE;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
}
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 1) ||
_cogl_check_extension ("GL_EXT_pixel_buffer_object", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_PBOS;

30
cogl/driver/gles/cogl-gles.c
View File

@ -33,6 +33,13 @@
#include "cogl-renderer-private.h"
#include "cogl-private.h"
#ifndef GL_UNSIGNED_INT_24_8
#define GL_UNSIGNED_INT_24_8 0x84FA
#endif
#ifndef GL_DEPTH_STENCIL
#define GL_DEPTH_STENCIL 0x84F9
#endif
static CoglBool
_cogl_driver_pixel_format_from_gl_internal (CoglContext *context,
GLenum gl_int_format,
@ -137,6 +144,23 @@ _cogl_driver_pixel_format_to_gl (CoglContext *context,
gltype = GL_UNSIGNED_SHORT_5_5_5_1;
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
glintformat = GL_DEPTH_COMPONENT;
glformat = GL_DEPTH_COMPONENT;
gltype = GL_UNSIGNED_SHORT;
break;
case COGL_PIXEL_FORMAT_DEPTH_32:
glintformat = GL_DEPTH_COMPONENT;
glformat = GL_DEPTH_COMPONENT;
gltype = GL_UNSIGNED_INT;
break;
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
glintformat = GL_DEPTH_STENCIL;
glformat = GL_DEPTH_STENCIL;
gltype = GL_UNSIGNED_INT_24_8;
break;
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();
@ -247,6 +271,12 @@ _cogl_driver_update_features (CoglContext *context,
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
}
if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
{
flags |= COGL_FEATURE_DEPTH_TEXTURE;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
}
if (_cogl_check_extension ("GL_OES_texture_npot", gl_extensions))
{
flags |= (COGL_FEATURE_TEXTURE_NPOT |

6
examples/cogl-info.c
View File

@ -109,6 +109,12 @@ struct {
"GLES2 API integration supported",
"Support for creating a GLES2 context for using the GLES2 API in a "
"way that's integrated with Cogl."
},
{
COGL_FEATURE_ID_DEPTH_TEXTURE,
"Depth Textures",
"CoglFramebuffers can be configured to render their depth buffer into "
"a texture"
}
};