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refactor code, export _mesa_generate_mipmap_level()

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This commit is contained in:
Brian 2008-02-08 16:56:21 -07:00 • committed by Keith Whitwell
parent 12dc9c99b9
commit abb465cdc7
2 changed files with 81 additions and 47 deletions
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117
src/mesa/main/mipmap.c
View file

@ -842,6 +842,70 @@ make_2d_stack_mipmap(GLenum datatype, GLuint comps, GLint border,
}
/**
* Down-sample a texture image to produce the next lower mipmap level.
*/
void
_mesa_generate_mipmap_level(GLenum target,
GLenum datatype, GLuint comps,
GLint border,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
const GLubyte *srcData,
GLint srcRowStride,
GLint dstWidth, GLint dstHeight, GLint dstDepth,
GLubyte *dstData,
GLint dstRowStride)
{
/*
* We use simple 2x2 averaging to compute the next mipmap level.
*/
switch (target) {
case GL_TEXTURE_1D:
make_1d_mipmap(datatype, comps, border,
srcWidth, srcData,
dstWidth, dstData);
break;
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
make_2d_mipmap(datatype, comps, border,
srcWidth, srcHeight, srcData, srcRowStride,
dstWidth, dstHeight, dstData, dstRowStride);
break;
case GL_TEXTURE_3D:
make_3d_mipmap(datatype, comps, border,
srcWidth, srcHeight, srcDepth,
srcData, srcRowStride,
dstWidth, dstHeight, dstDepth,
dstData, dstRowStride);
break;
case GL_TEXTURE_1D_ARRAY_EXT:
make_1d_stack_mipmap(datatype, comps, border,
srcWidth, srcData, srcRowStride,
dstWidth, dstHeight,
dstData, dstRowStride);
break;
case GL_TEXTURE_2D_ARRAY_EXT:
make_2d_stack_mipmap(datatype, comps, border,
srcWidth, srcHeight,
srcData, srcRowStride,
dstWidth, dstHeight,
dstDepth, dstData, dstRowStride);
break;
case GL_TEXTURE_RECTANGLE_NV:
/* no mipmaps, do nothing */
break;
default:
_mesa_problem(ctx, "bad dimensions in _mesa_generate_mipmaps");
return;
}
}
/**
* For GL_SGIX_generate_mipmap:
* Generate a complete set of mipmaps from texObj's base-level image.
@ -1034,53 +1098,12 @@ _mesa_generate_mipmap(GLcontext *ctx, GLenum target,
dstData = (GLubyte *) dstImage->Data;
}
/*
* We use simple 2x2 averaging to compute the next mipmap level.
*/
switch (target) {
case GL_TEXTURE_1D:
make_1d_mipmap(datatype, comps, border,
srcWidth, srcData,
dstWidth, dstData);
break;
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
make_2d_mipmap(datatype, comps, border,
srcWidth, srcHeight, srcData, srcImage->RowStride,
dstWidth, dstHeight, dstData, dstImage->RowStride);
break;
case GL_TEXTURE_3D:
make_3d_mipmap(datatype, comps, border,
srcWidth, srcHeight, srcDepth,
srcData, srcImage->RowStride,
dstWidth, dstHeight, dstDepth,
dstData, dstImage->RowStride);
break;
case GL_TEXTURE_1D_ARRAY_EXT:
make_1d_stack_mipmap(datatype, comps, border,
srcWidth, srcData, srcImage->RowStride,
dstWidth, dstHeight,
dstData, dstImage->RowStride);
break;
case GL_TEXTURE_2D_ARRAY_EXT:
make_2d_stack_mipmap(datatype, comps, border,
srcWidth, srcHeight,
srcData, srcImage->RowStride,
dstWidth, dstHeight,
dstDepth, dstData, dstImage->RowStride);
break;
case GL_TEXTURE_RECTANGLE_NV:
/* no mipmaps, do nothing */
break;
default:
_mesa_problem(ctx, "bad dimensions in _mesa_generate_mipmaps");
return;
}
_mesa_generate_mipmap_level(target, datatype, comps, border,
srcWidth, srcHeight, srcDepth,
srcData, srcImage->RowStride,
dstWidth, dstHeight, dstDepth,
dstData, dstImage->RowStride);
if (dstImage->IsCompressed) {
GLubyte *temp;

11
src/mesa/main/mipmap.h
View file

@ -28,6 +28,17 @@
#include "mtypes.h"
extern void
_mesa_generate_mipmap_level(GLenum target,
GLenum datatype, GLuint comps,
GLint border,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
const GLubyte *srcData,
GLint dstWidth, GLint dstHeight, GLint dstDepth,
GLubyte *dstData);
extern void
_mesa_generate_mipmap(GLcontext *ctx, GLenum target,
struct gl_texture_object *texObj);