diff options
| author | Damien Lespiau <damien.lespiau@intel.com> | 2012-05-23 18:19:29 +0100 |
|---|---|---|
| committer | Robert Bragg <robert@linux.intel.com> | 2013-01-18 10:53:29 +0000 |
| commit | 87bc616d34589beaf972a79ffed35199b3d16d2e (patch) | |
| tree | 50747d8d38a7872edf0db77af1abdaa826cdd7a1 /cogl/cogl-types.h | |
| parent | 58bbf8499a12c3e43ac6f510d47de507adb3b803 (diff) | |
| download | cogl-87bc616d34589beaf972a79ffed35199b3d16d2e.tar.gz | |
framebuffer: Support texture based depth buffers
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.
Diffstat (limited to 'cogl/cogl-types.h')
| -rw-r--r-- | cogl/cogl-types.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/cogl/cogl-types.h b/cogl/cogl-types.h index 933cac02..3d73696a 100644 --- a/cogl/cogl-types.h +++ b/cogl/cogl-types.h @@ -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; /** |