diff options
author | Francisco Jerez <[email protected]> | 2013-12-07 23:35:04 +0100 |
---|---|---|
committer | Francisco Jerez <[email protected]> | 2014-01-15 16:42:07 +0100 |
commit | d9b0b4e960b07140e5ece4b4ff6a142277408bfb (patch) | |
tree | 8100fdfea803f569c06f804d4f748cb8368b9c2b /src | |
parent | bfcf78c1101a1cbcdd9a479722203047c8d6c26a (diff) |
mesa: Define helper function to get the number of texture layers.
And to check if it can have layers at all. This will be used by the
implementation of ARB_shader_image_load_store.
v2: Fix constness of texobj argument, use assert and return reasonable
default rather than calling unreachable() in default switch case.
Reviewed-by: Paul Berry <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Diffstat (limited to 'src')
-rw-r--r-- | src/mesa/main/teximage.c | 87 | ||||
-rw-r--r-- | src/mesa/main/teximage.h | 6 |
2 files changed, 93 insertions, 0 deletions
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c index 9c3f1e86e5b..8aac54e9d8d 100644 --- a/src/mesa/main/teximage.c +++ b/src/mesa/main/teximage.c @@ -1088,6 +1088,93 @@ _mesa_get_texture_dimensions(GLenum target) /** + * Check if a texture target can have more than one layer. + */ +GLboolean +_mesa_tex_target_is_layered(GLenum target) +{ + switch (target) { + case GL_TEXTURE_1D: + case GL_PROXY_TEXTURE_1D: + case GL_TEXTURE_2D: + case GL_PROXY_TEXTURE_2D: + case GL_TEXTURE_RECTANGLE: + case GL_PROXY_TEXTURE_RECTANGLE: + case GL_TEXTURE_2D_MULTISAMPLE: + case GL_PROXY_TEXTURE_2D_MULTISAMPLE: + case GL_TEXTURE_BUFFER: + case GL_TEXTURE_CUBE_MAP_POSITIVE_X: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_X: + case GL_TEXTURE_CUBE_MAP_POSITIVE_Y: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y: + case GL_TEXTURE_CUBE_MAP_POSITIVE_Z: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z: + case GL_TEXTURE_EXTERNAL_OES: + return GL_FALSE; + + case GL_TEXTURE_3D: + case GL_PROXY_TEXTURE_3D: + case GL_TEXTURE_CUBE_MAP: + case GL_PROXY_TEXTURE_CUBE_MAP: + case GL_TEXTURE_1D_ARRAY: + case GL_PROXY_TEXTURE_1D_ARRAY: + case GL_TEXTURE_2D_ARRAY: + case GL_PROXY_TEXTURE_2D_ARRAY: + case GL_TEXTURE_CUBE_MAP_ARRAY: + case GL_PROXY_TEXTURE_CUBE_MAP_ARRAY: + case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: + case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY: + return GL_TRUE; + + default: + assert(!"Invalid texture target."); + return GL_FALSE; + } +} + + +/** + * Return the number of layers present in the given level of an array, + * cubemap or 3D texture. If the texture is not layered return zero. + */ +GLuint +_mesa_get_texture_layers(const struct gl_texture_object *texObj, GLint level) +{ + assert(level >= 0 && level < MAX_TEXTURE_LEVELS); + + switch (texObj->Target) { + case GL_TEXTURE_1D: + case GL_TEXTURE_2D: + case GL_TEXTURE_RECTANGLE: + case GL_TEXTURE_2D_MULTISAMPLE: + case GL_TEXTURE_BUFFER: + case GL_TEXTURE_EXTERNAL_OES: + return 0; + + case GL_TEXTURE_CUBE_MAP: + return 6; + + case GL_TEXTURE_1D_ARRAY: { + struct gl_texture_image *img = texObj->Image[0][level]; + return img ? img->Height : 0; + } + + case GL_TEXTURE_3D: + case GL_TEXTURE_2D_ARRAY: + case GL_TEXTURE_CUBE_MAP_ARRAY: + case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: { + struct gl_texture_image *img = texObj->Image[0][level]; + return img ? img->Depth : 0; + } + + default: + assert(!"Invalid texture target."); + return 0; + } +} + + +/** * Return the maximum number of mipmap levels for the given target * and the dimensions. * The dimensions are expected not to include the border. diff --git a/src/mesa/main/teximage.h b/src/mesa/main/teximage.h index 0b5786340b7..80a0a57b505 100644 --- a/src/mesa/main/teximage.h +++ b/src/mesa/main/teximage.h @@ -138,6 +138,12 @@ _mesa_tex_target_to_face(GLenum target); extern GLint _mesa_get_texture_dimensions(GLenum target); +extern GLboolean +_mesa_tex_target_is_layered(GLenum target); + +extern GLuint +_mesa_get_texture_layers(const struct gl_texture_object *texObj, GLint level); + extern GLsizei _mesa_get_tex_max_num_levels(GLenum target, GLsizei width, GLsizei height, GLsizei depth); |