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mesa: add new _mesa_Get[Compressed]TextureSubImage() functions 

Simple implementations in terms of get_[compressed_]texture_image().

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Brian Paul 2015-07-21 18:35:38 -06:00
parent a92f0277d8
commit 2494f91fb8
2 changed files with 76 additions and 1 deletions
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62
src/mesa/main/texgetimage.c
View File

@ -893,7 +893,8 @@ legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa)
/**
* Wrapper for _mesa_select_tex_image() which can handle target being
* GL_TEXTURE_CUBE_MAP_ARB in which case we use zoffset to select a cube face.
* This can happen for glGetTextureImage (DSA function).
* This can happen for glGetTextureImage and glGetTextureSubImage (DSA
* functions).
*/
static struct gl_texture_image *
select_tex_image(const struct gl_texture_object *texObj, GLenum target,
@ -1436,6 +1437,35 @@ _mesa_GetTextureImage(GLuint texture, GLint level, GLenum format, GLenum type,
}
void GLAPIENTRY
_mesa_GetTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
void *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetTextureSubImage";
struct gl_texture_object *texObj =
_mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
if (getteximage_error_check(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset, width, height, depth,
format, type, bufSize, pixels, caller)) {
return;
}
get_texture_image(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset, width, height, depth,
format, type, pixels, caller);
}
/**
* Compute the number of bytes which will be written when retrieving
* a sub-region of a compressed texture.
@ -1714,3 +1744,33 @@ _mesa_GetCompressedTextureImage(GLuint texture, GLint level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void APIENTRY
_mesa_GetCompressedTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset,
GLint zoffset, GLsizei width,
GLsizei height, GLsizei depth,
GLsizei bufSize, void *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetCompressedTextureImage";
struct gl_texture_object *texObj;
texObj = _mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset,
width, height, depth,
bufSize, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset,
width, height, depth,
pixels, caller);
}

15
src/mesa/main/texgetimage.h
View File

@ -70,6 +70,14 @@ extern void GLAPIENTRY
_mesa_GetTextureImage(GLuint texture, GLint level, GLenum format,
GLenum type, GLsizei bufSize, GLvoid *pixels);
extern void GLAPIENTRY
_mesa_GetTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
void *pixels);
extern void GLAPIENTRY
_mesa_GetCompressedTexImage(GLenum target, GLint lod, GLvoid *img);
@ -81,4 +89,11 @@ extern void GLAPIENTRY
_mesa_GetCompressedTextureImage(GLuint texture, GLint level, GLsizei bufSize,
GLvoid *pixels);
extern void APIENTRY
_mesa_GetCompressedTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset,
GLint zoffset, GLsizei width,
GLsizei height, GLsizei depth,
GLsizei bufSize, void *pixels);
#endif /* TEXGETIMAGE_H */