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/* $XFree86: xc/lib/GL/mesa/src/drv/gamma/gamma_texstate.c,v 1.5 2002/11/05 17:46:07 tsi Exp $ */
#include <stdlib.h>
#include <stdio.h>
#include "glheader.h"
#include "macros.h"
#include "mtypes.h"
#include "simple_list.h"
#include "enums.h"
#include "mm.h"
#include "gamma_context.h"
static void gammaSetTexImages( gammaContextPtr gmesa,
struct gl_texture_object *tObj )
{
GLuint height, width, pitch, i, log_pitch;
gammaTextureObjectPtr t = (gammaTextureObjectPtr) tObj->DriverData;
const struct gl_texture_image *baseImage = tObj->Image[0][tObj->BaseLevel];
GLint firstLevel, lastLevel, numLevels;
GLint log2Width, log2Height;
/* fprintf(stderr, "%s\n", __FUNCTION__); */
t->texelBytes = 2;
/* Compute which mipmap levels we really want to send to the hardware.
* This depends on the base image size, GL_TEXTURE_MIN_LOD,
* GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
* Yes, this looks overly complicated, but it's all needed.
*/
if (tObj->MinFilter == GL_LINEAR || tObj->MinFilter == GL_NEAREST) {
firstLevel = lastLevel = tObj->BaseLevel;
}
else {
firstLevel = tObj->BaseLevel + (GLint) (tObj->MinLod + 0.5);
firstLevel = MAX2(firstLevel, tObj->BaseLevel);
lastLevel = tObj->BaseLevel + (GLint) (tObj->MaxLod + 0.5);
lastLevel = MAX2(lastLevel, tObj->BaseLevel);
lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
lastLevel = MIN2(lastLevel, tObj->MaxLevel);
lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
}
/* save these values */
t->firstLevel = firstLevel;
t->lastLevel = lastLevel;
numLevels = lastLevel - firstLevel + 1;
log2Width = tObj->Image[0][firstLevel]->WidthLog2;
log2Height = tObj->Image[0][firstLevel]->HeightLog2;
/* Figure out the amount of memory required to hold all the mipmap
* levels. Choose the smallest pitch to accomodate the largest
* mipmap:
*/
width = tObj->Image[0][firstLevel]->Width * t->texelBytes;
for (pitch = 32, log_pitch=2 ; pitch < width ; pitch *= 2 )
log_pitch++;
/* All images must be loaded at this pitch. Count the number of
* lines required:
*/
for ( height = i = 0 ; i < numLevels ; i++ ) {
t->image[i].image = tObj->Image[0][firstLevel + i];
t->image[i].offset = height * pitch;
t->image[i].internalFormat = baseImage->Format;
height += t->image[i].image->Height;
t->TextureBaseAddr[i] = /* ??? */
(unsigned long)(t->image[i].offset + t->BufAddr) << 5;
}
t->Pitch = pitch;
t->totalSize = height*pitch;
t->max_level = i-1;
gmesa->dirty |= GAMMA_UPLOAD_TEX0 /* | GAMMA_UPLOAD_TEX1*/;
gammaUploadTexImages( gmesa, t );
}
static void gammaUpdateTexEnv( GLcontext *ctx, GLuint unit )
{
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
const struct gl_texture_object *tObj = texUnit->_Current;
const GLuint format = tObj->Image[0][tObj->BaseLevel]->Format;
gammaTextureObjectPtr t = (gammaTextureObjectPtr)tObj->DriverData;
GLuint tc;
/* fprintf(stderr, "%s\n", __FUNCTION__); */
tc = t->TextureColorMode & ~(TCM_BaseFormatMask | TCM_ApplicationMask);
switch (format) {
case GL_RGB:
tc |= TCM_BaseFormat_RGB;
break;
case GL_LUMINANCE:
tc |= TCM_BaseFormat_Lum;
break;
case GL_ALPHA:
tc |= TCM_BaseFormat_Alpha;
break;
case GL_LUMINANCE_ALPHA:
tc |= TCM_BaseFormat_LumAlpha;
break;
case GL_INTENSITY:
tc |= TCM_BaseFormat_Intensity;
break;
case GL_RGBA:
tc |= TCM_BaseFormat_RGBA;
break;
case GL_COLOR_INDEX:
break;
}
switch (texUnit->EnvMode) {
case GL_REPLACE:
tc |= TCM_Replace;
break;
case GL_MODULATE:
tc |= TCM_Modulate;
break;
case GL_ADD:
/* do nothing ???*/
break;
case GL_DECAL:
tc |= TCM_Decal;
break;
case GL_BLEND:
tc |= TCM_Blend;
break;
default:
fprintf(stderr, "unknown tex env mode");
return;
}
t->TextureColorMode = tc;
}
static void gammaUpdateTexUnit( GLcontext *ctx, GLuint unit )
{
gammaContextPtr gmesa = GAMMA_CONTEXT(ctx);
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
/* fprintf(stderr, "%s\n", __FUNCTION__); */
if (texUnit->_ReallyEnabled == TEXTURE_2D_BIT)
{
struct gl_texture_object *tObj = texUnit->_Current;
gammaTextureObjectPtr t = (gammaTextureObjectPtr)tObj->DriverData;
/* Upload teximages (not pipelined)
*/
if (t->dirty_images) {
gammaSetTexImages( gmesa, tObj );
if (!t->MemBlock) {
FALLBACK( gmesa, GAMMA_FALLBACK_TEXTURE, GL_TRUE );
return;
}
}
#if 0
if (tObj->Image[0][tObj->BaseLevel]->Border > 0) {
FALLBACK( gmesa, GAMMA_FALLBACK_TEXTURE, GL_TRUE );
return;
}
#endif
/* Update state if this is a different texture object to last
* time.
*/
if (gmesa->CurrentTexObj[unit] != t) {
gmesa->dirty |= GAMMA_UPLOAD_TEX0 /* << unit */;
gmesa->CurrentTexObj[unit] = t;
gammaUpdateTexLRU( gmesa, t ); /* done too often */
}
/* Update texture environment if texture object image format or
* texture environment state has changed.
*/
if (tObj->Image[0][tObj->BaseLevel]->Format != gmesa->TexEnvImageFmt[unit]) {
gmesa->TexEnvImageFmt[unit] = tObj->Image[0][tObj->BaseLevel]->Format;
gammaUpdateTexEnv( ctx, unit );
}
}
else if (texUnit->_ReallyEnabled) {
FALLBACK( gmesa, GAMMA_FALLBACK_TEXTURE, GL_TRUE );
}
else /*if (gmesa->CurrentTexObj[unit])*/ {
gmesa->CurrentTexObj[unit] = 0;
gmesa->TexEnvImageFmt[unit] = 0;
gmesa->dirty &= ~(GAMMA_UPLOAD_TEX0<<unit);
}
}
void gammaUpdateTextureState( GLcontext *ctx )
{
gammaContextPtr gmesa = GAMMA_CONTEXT(ctx);
/* fprintf(stderr, "%s\n", __FUNCTION__); */
FALLBACK( gmesa, GAMMA_FALLBACK_TEXTURE, GL_FALSE );
gammaUpdateTexUnit( ctx, 0 );
#if 0
gammaUpdateTexUnit( ctx, 1 );
#endif
}
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