aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/Mesa/src/mesa/main/texcompress.c
diff options
context:
space:
mode:
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/main/texcompress.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/main/texcompress.c254
1 files changed, 0 insertions, 254 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/main/texcompress.c b/nx-X11/extras/Mesa/src/mesa/main/texcompress.c
deleted file mode 100644
index d18b1d0b4..000000000
--- a/nx-X11/extras/Mesa/src/mesa/main/texcompress.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.1
- *
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \file texcompress.c
- * Helper functions for texture compression.
- */
-
-
-#include "glheader.h"
-#include "imports.h"
-#include "colormac.h"
-#include "context.h"
-#include "image.h"
-#include "texcompress.h"
-#include "texformat.h"
-#include "texstore.h"
-
-/**
- * Get the list of supported internal compression formats.
- *
- * \param ctx GL context.
- * \param formats the resulting format list (may be NULL).
- *
- * \return number of formats.
- */
-GLuint
-_mesa_get_compressed_formats( GLcontext *ctx, GLint *formats )
-{
- GLuint n = 0;
- if (ctx->Extensions.ARB_texture_compression) {
- if (ctx->Extensions.TDFX_texture_compression_FXT1) {
- if (formats) {
- formats[n++] = GL_COMPRESSED_RGB_FXT1_3DFX;
- formats[n++] = GL_COMPRESSED_RGBA_FXT1_3DFX;
- }
- else {
- n += 2;
- }
- }
- if (ctx->Extensions.EXT_texture_compression_s3tc) {
- if (formats) {
- formats[n++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
- /* Skip this one because it has a restriction (all transparent
- * pixels become black). See the texture compressions spec for
- * a detailed explanation. This is what NVIDIA does.
- formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
- */
- formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
- formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
- }
- else {
- n += 3;
- }
- }
- if (ctx->Extensions.S3_s3tc) {
- if (formats) {
- formats[n++] = GL_RGB_S3TC;
- formats[n++] = GL_RGB4_S3TC;
- formats[n++] = GL_RGBA_S3TC;
- formats[n++] = GL_RGBA4_S3TC;
- }
- else {
- n += 4;
- }
- }
- }
- return n;
-}
-
-
-
-/**
- * Return number of bytes needed to store a texture of the given size
- * using the specified compressed format.
- * This is called via the ctx->Driver.CompressedTextureSize function,
- * unless a device driver overrides it.
- *
- * \param width texture width in texels.
- * \param height texture height in texels.
- * \param depth texture depth in texels.
- * \param format - one of the specific compressed texture formats
- *
- * \return size in bytes, or zero if bad format
- */
-GLuint
-_mesa_compressed_texture_size( GLcontext *ctx,
- GLsizei width, GLsizei height, GLsizei depth,
- GLenum format )
-{
- GLuint size;
-
- ASSERT(depth == 1);
- (void) depth;
-
- switch (format) {
- case GL_COMPRESSED_RGB_FXT1_3DFX:
- case GL_COMPRESSED_RGBA_FXT1_3DFX:
- /* round up width to next multiple of 8, height to next multiple of 4 */
- width = (width + 7) & ~7;
- height = (height + 3) & ~3;
- /* 16 bytes per 8x4 tile of RGB[A] texels */
- size = width * height / 2;
- /* Textures smaller than 8x4 will effectively be made into 8x4 and
- * take 16 bytes.
- */
- if (size < 16)
- size = 16;
- return size;
- case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
- case GL_RGB_S3TC:
- case GL_RGB4_S3TC:
- /* round up width, height to next multiple of 4 */
- width = (width + 3) & ~3;
- height = (height + 3) & ~3;
- /* 8 bytes per 4x4 tile of RGB[A] texels */
- size = width * height / 2;
- /* Textures smaller than 4x4 will effectively be made into 4x4 and
- * take 8 bytes.
- */
- if (size < 8)
- size = 8;
- return size;
- case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
- case GL_RGBA_S3TC:
- case GL_RGBA4_S3TC:
- /* round up width, height to next multiple of 4 */
- width = (width + 3) & ~3;
- height = (height + 3) & ~3;
- /* 16 bytes per 4x4 tile of RGBA texels */
- size = width * height; /* simple! */
- /* Textures smaller than 4x4 will effectively be made into 4x4 and
- * take 16 bytes.
- */
- if (size < 16)
- size = 16;
- return size;
- default:
- _mesa_problem(ctx, "bad texformat in compressed_texture_size");
- return 0;
- }
-}
-
-
-/*
- * Compute the bytes per row in a compressed texture image.
- * We use this for computing the destination address for sub-texture updates.
- * \param format one of the specific texture compression formats
- * \param width image width in pixels
- * \return stride, in bytes, between rows for compressed image
- */
-GLint
-_mesa_compressed_row_stride(GLenum format, GLsizei width)
-{
- GLint stride;
-
- switch (format) {
- case GL_COMPRESSED_RGB_FXT1_3DFX:
- case GL_COMPRESSED_RGBA_FXT1_3DFX:
- stride = ((width + 7) / 8) * 16; /* 16 bytes per 8x4 tile */
- break;
- case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
- case GL_RGB_S3TC:
- case GL_RGB4_S3TC:
- stride = ((width + 3) / 4) * 8; /* 8 bytes per 4x4 tile */
- break;
- case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
- case GL_RGBA_S3TC:
- case GL_RGBA4_S3TC:
- stride = ((width + 3) / 4) * 16; /* 16 bytes per 4x4 tile */
- break;
- default:
- return 0;
- }
-
- return stride;
-}
-
-
-/*
- * Return the address of the pixel at (col, row, img) in a
- * compressed texture image.
- * \param col, row, img - image position (3D)
- * \param format - compressed image format
- * \param width - image width
- * \param image - the image address
- * \return address of pixel at (row, col)
- */
-GLubyte *
-_mesa_compressed_image_address(GLint col, GLint row, GLint img,
- GLenum format,
- GLsizei width, const GLubyte *image)
-{
- GLubyte *addr;
-
- (void) img;
-
- /* We try to spot a "complete" subtexture "above" ROW, COL;
- * this texture is given by appropriate rounding of WIDTH x ROW.
- * Then we just add the amount left (usually on the left).
- *
- * Example for X*Y microtiles (Z bytes each)
- * offset = Z * (((width + X - 1) / X) * (row / Y) + col / X);
- */
-
- switch (format) {
- case GL_COMPRESSED_RGB_FXT1_3DFX:
- case GL_COMPRESSED_RGBA_FXT1_3DFX:
- addr = (GLubyte *) image + 16 * (((width + 7) / 8) * (row / 4) + col / 8);
- break;
- case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
- case GL_RGB_S3TC:
- case GL_RGB4_S3TC:
- addr = (GLubyte *) image + 8 * (((width + 3) / 4) * (row / 4) + col / 4);
- break;
- case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
- case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
- case GL_RGBA_S3TC:
- case GL_RGBA4_S3TC:
- addr = (GLubyte *) image + 16 * (((width + 3) / 4) * (row / 4) + col / 4);
- break;
- default:
- return NULL;
- }
-
- return addr;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-09 03:26:34 +0000