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added _mesa_get_teximages_from_driver()

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This commit is contained in:
Brian Paul
2000-10-16 23:43:12 +00:00
parent 1100b4daa3
commit 1873b567b2
2 changed files with 60 additions and 4 deletions
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52
src/mesa/main/teximage.c
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@@ -1,4 +1,4 @@
/* $Id: teximage.c,v 1.51 2000/09/28 18:30:39 brianp Exp $ */
/* $Id: teximage.c,v 1.52 2000/10/16 23:43:12 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -2114,6 +2114,56 @@ _mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
}
/*
* Get all the mipmap images for a texture object from the device driver.
* Actually, only get mipmap images if we're using a mipmap filter.
*/
GLboolean
_mesa_get_teximages_from_driver(GLcontext *ctx,
struct gl_texture_object *texObj)
{
if (ctx->Driver.GetTexImage) {
static const GLenum targets[] = {
GL_TEXTURE_1D,
GL_TEXTURE_2D,
GL_TEXTURE_3D,
GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_CUBE_MAP_ARB
};
GLboolean needLambda = (texObj->MinFilter != texObj->MagFilter);
GLenum target = targets[texObj->Dimensions - 1];
if (needLambda) {
GLint level;
/* Get images for all mipmap levels. We might not need them
* all but this is easier. We're on a (slow) software path
* anyway.
*/
for (level = 0; level <= texObj->P; level++) {
struct gl_texture_image *texImg = texObj->Image[level];
if (texImg && !texImg->Data) {
_mesa_get_teximage_from_driver(ctx, target, level, texObj);
if (!texImg->Data)
return GL_FALSE; /* out of memory */
}
}
}
else {
GLint level = texObj->BaseLevel;
struct gl_texture_image *texImg = texObj->Image[level];
if (texImg && !texImg->Data) {
_mesa_get_teximage_from_driver(ctx, target, level, texObj);
if (!texImg->Data)
return GL_FALSE; /* out of memory */
}
}
return GL_TRUE;
}
return GL_FALSE;
}
void
_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
GLenum type, GLvoid *pixels )

12
src/mesa/main/teximage.h
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@@ -1,4 +1,4 @@
/* $Id: teximage.h,v 1.13 2000/09/05 15:41:25 brianp Exp $ */
/* $Id: teximage.h,v 1.14 2000/10/16 23:43:12 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -65,8 +65,14 @@ _mesa_select_tex_image(GLcontext *ctx, const struct gl_texture_unit *texUnit,
extern void
_mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
const struct gl_texture_object *texObj );
_mesa_get_teximage_from_driver(GLcontext *ctx, GLenum target, GLint level,
const struct gl_texture_object *texObj);
extern GLboolean
_mesa_get_teximages_from_driver(GLcontext *ctx,
struct gl_texture_object *texObj);
/*** API entry point functions ***/