/**
* Fetch a texel with given lod.
* Called via machine->FetchTexelLod()
*/
static void
fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
GLuint unit, GLfloat color[4] )
{
const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
if (texObj) {
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan rgba[4];
lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
/* XXX use a float-valued TextureSample routine here!!! */
swrast->TextureSample[unit](ctx, texObj, 1,
(const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
color[0] = CHAN_TO_FLOAT(rgba[0]);
color[1] = CHAN_TO_FLOAT(rgba[1]);
color[2] = CHAN_TO_FLOAT(rgba[2]);
color[3] = CHAN_TO_FLOAT(rgba[3]);
}
else {
color[0] = color[1] = color[2] = 0.0F;
color[3] = 1.0F;
}
}
static void feedback_vertex( GLcontext *ctx,
const SWvertex *v, const SWvertex *pv )
{
const GLuint texUnit = 0; /* See section 5.3 of 1.2.1 spec */
GLfloat win[4];
GLfloat color[4];
GLfloat tc[4];
win[0] = v->win[0];
win[1] = v->win[1];
win[2] = v->win[2] / ctx->DepthMaxF;
win[3] = 1.0F / v->win[3];
color[0] = CHAN_TO_FLOAT(pv->color[0]);
color[1] = CHAN_TO_FLOAT(pv->color[1]);
color[2] = CHAN_TO_FLOAT(pv->color[2]);
color[3] = CHAN_TO_FLOAT(pv->color[3]);
if (v->texcoord[texUnit][3] != 1.0 &&
v->texcoord[texUnit][3] != 0.0) {
GLfloat invq = 1.0F / v->texcoord[texUnit][3];
tc[0] = v->texcoord[texUnit][0] * invq;
tc[1] = v->texcoord[texUnit][1] * invq;
tc[2] = v->texcoord[texUnit][2] * invq;
tc[3] = v->texcoord[texUnit][3];
}
else {
COPY_4V(tc, v->texcoord[texUnit]);
}
_mesa_feedback_vertex( ctx, win, color, (GLfloat) v->index, tc );
}
/**
* Fetch a texel with the given partial derivatives to compute a level
* of detail in the mipmap.
*/
static void
fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4],
const GLfloat texdx[4], const GLfloat texdy[4],
GLfloat lodBias, GLuint unit, GLfloat color[4] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
GLfloat lambda;
GLchan rgba[4];
if (texObj) {
const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel];
const GLfloat texW = (GLfloat) texImg->WidthScale;
const GLfloat texH = (GLfloat) texImg->HeightScale;
lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
texdx[1], texdy[1], /* dt/dx, dt/dy */
texdx[3], texdy[2], /* dq/dx, dq/dy */
texW, texH,
texcoord[0], texcoord[1], texcoord[3],
1.0F / texcoord[3]) + lodBias;
lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
}
swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
color[0] = CHAN_TO_FLOAT(rgba[0]);
color[1] = CHAN_TO_FLOAT(rgba[1]);
color[2] = CHAN_TO_FLOAT(rgba[2]);
color[3] = CHAN_TO_FLOAT(rgba[3]);
}
/**
* Convert GLchan[n][4] colors to GLfloat[n][4].
* XXX maybe move into image.c
*/
static void
chan_span_to_float(GLuint n, CONST GLchan in[][4], GLfloat out[][4])
{
GLuint i;
for (i = 0; i < n; i++) {
out[i][RCOMP] = CHAN_TO_FLOAT(in[i][RCOMP]);
out[i][GCOMP] = CHAN_TO_FLOAT(in[i][GCOMP]);
out[i][BCOMP] = CHAN_TO_FLOAT(in[i][BCOMP]);
out[i][ACOMP] = CHAN_TO_FLOAT(in[i][ACOMP]);
}
}
static void extract_4chan_4f_rgba( const struct tnl_clipspace_attr *a, GLfloat *out,
const GLubyte *v )
{
GLchan *c = (GLchan *)v;
(void) a;
out[0] = CHAN_TO_FLOAT(c[0]);
out[1] = CHAN_TO_FLOAT(c[1]);
out[2] = CHAN_TO_FLOAT(c[2]);
out[3] = CHAN_TO_FLOAT(c[3]);
}
void
_mesa_fetch_texel_2d_f_rgba_dxt5(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
/* just sample as GLchan and convert to float here */
GLchan rgba[4];
fetch_texel_2d_rgba_dxt5(texImage, i, j, k, rgba);
texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]);
texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]);
texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]);
texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]);
}
static void
init_machine(GLcontext * ctx, struct atifs_machine *machine,
const struct ati_fragment_shader *shader,
const struct sw_span *span, GLuint col)
{
GLint i, j;
for (i = 0; i < 6; i++) {
for (j = 0; j < 4; j++)
ctx->ATIFragmentShader.Machine.Registers[i][j] = 0.0;
}
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][0] =
CHAN_TO_FLOAT(span->array->rgba[col][0]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][1] =
CHAN_TO_FLOAT(span->array->rgba[col][1]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][2] =
CHAN_TO_FLOAT(span->array->rgba[col][2]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_PRIMARY][3] =
CHAN_TO_FLOAT(span->array->rgba[col][3]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][0] =
CHAN_TO_FLOAT(span->array->spec[col][0]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][1] =
CHAN_TO_FLOAT(span->array->spec[col][1]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][2] =
CHAN_TO_FLOAT(span->array->spec[col][2]);
ctx->ATIFragmentShader.Machine.Inputs[ATI_FS_INPUT_SECONDARY][3] =
CHAN_TO_FLOAT(span->array->spec[col][3]);
ctx->ATIFragmentShader.Machine.pass = 0;
}
static void TEX( void *cc, const float *texcoord, int unit, float *result )
{
GLcontext *ctx = (GLcontext *)cc;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat lambda = 1.0; /* hack */
GLchan rgba[4];
swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
result[0] = CHAN_TO_FLOAT(rgba[0]);
result[1] = CHAN_TO_FLOAT(rgba[1]);
result[2] = CHAN_TO_FLOAT(rgba[2]);
result[3] = CHAN_TO_FLOAT(rgba[3]);
}
/**
* Fetch a texel.
*/
static void
fetch_texel(GLcontext * ctx, const GLfloat texcoord[4], GLfloat lambda,
GLuint unit, GLfloat color[4])
{
GLchan rgba[4];
SWcontext *swrast = SWRAST_CONTEXT(ctx);
/* XXX use a float-valued TextureSample routine here!!! */
swrast->TextureSample[unit] (ctx, unit, ctx->Texture.Unit[unit]._Current,
1, (const GLfloat(*)[4]) texcoord,
&lambda, &rgba);
color[0] = CHAN_TO_FLOAT(rgba[0]);
color[1] = CHAN_TO_FLOAT(rgba[1]);
color[2] = CHAN_TO_FLOAT(rgba[2]);
color[3] = CHAN_TO_FLOAT(rgba[3]);
}
/**
* Add specular color to primary color, draw point, restore original
* primary color.
*/
void
_swrast_add_spec_terms_point(GLcontext *ctx, const SWvertex *v0)
{
SWvertex *ncv0 = (SWvertex *) v0; /* cast away const */
GLfloat rSum, gSum, bSum;
GLchan cSave[4];
/* save */
COPY_CHAN4(cSave, ncv0->color);
/* sum */
rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
/* draw */
SWRAST_CONTEXT(ctx)->SpecPoint(ctx, ncv0);
/* restore */
COPY_CHAN4(ncv0->color, cSave);
}
void
_swrast_add_spec_terms_line(struct gl_context *ctx,
const SWvertex *v0, const SWvertex *v1)
{
SWvertex *ncv0 = (SWvertex *)v0;
SWvertex *ncv1 = (SWvertex *)v1;
GLfloat rSum, gSum, bSum;
GLchan cSave[2][4];
/* save original colors */
COPY_CHAN4(cSave[0], ncv0->color);
COPY_CHAN4(cSave[1], ncv1->color);
/* sum v0 */
rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
/* sum v1 */
rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
/* draw */
SWRAST_CONTEXT(ctx)->SpecLine( ctx, ncv0, ncv1 );
/* restore original colors */
COPY_CHAN4( ncv0->attrib[FRAG_ATTRIB_COL0], cSave[0] );
COPY_CHAN4( ncv1->attrib[FRAG_ATTRIB_COL0], cSave[1] );
}
/**
* Adaptor for fetching a float texel from a GLchan-valued texture.
*/
static void
fetch_texel_chan_to_float(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texelOut)
{
GLchan temp[4];
GLenum baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
ASSERT(texImage->FetchTexelc);
texImage->FetchTexelc(texImage, i, j, k, temp);
if (baseFormat == GL_DEPTH_COMPONENT ||
baseFormat == GL_DEPTH_STENCIL_EXT) {
/* just one channel */
texelOut[0] = CHAN_TO_FLOAT(temp[0]);
}
else {
/* four channels */
texelOut[0] = CHAN_TO_FLOAT(temp[0]);
texelOut[1] = CHAN_TO_FLOAT(temp[1]);
texelOut[2] = CHAN_TO_FLOAT(temp[2]);
texelOut[3] = CHAN_TO_FLOAT(temp[3]);
}
}
static void TXB( void *cc, const float *texcoord, int unit, float *result )
{
GLcontext *ctx = (GLcontext *)cc;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat lambda = 1.0; /* hack */
GLchan rgba[4];
/* texcoord[3] is the bias to add to lambda */
lambda += texcoord[3];
/* Is it necessary to reset texcoord[3] to 1 at this point?
*/
swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
result[0] = CHAN_TO_FLOAT(rgba[0]);
result[1] = CHAN_TO_FLOAT(rgba[1]);
result[2] = CHAN_TO_FLOAT(rgba[2]);
result[3] = CHAN_TO_FLOAT(rgba[3]);
}
/*
* Convert RGBA values into strq texture coordinates.
*/
void
_mesa_pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
GLfloat s[], GLfloat t[], GLfloat r[], GLfloat q[])
{
if (ctx->Pixel.FragmentRgbSource == GL_CURRENT_RASTER_COLOR) {
GLuint i;
for (i = 0; i < n; i++) {
s[i] = ctx->Current.RasterColor[RCOMP];
t[i] = ctx->Current.RasterColor[GCOMP];
r[i] = ctx->Current.RasterColor[BCOMP];
}
}
else {
GLuint i;
ASSERT(ctx->Pixel.FragmentRgbSource == GL_PIXEL_GROUP_COLOR_SGIS);
for (i = 0; i < n; i++) {
s[i] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
t[i] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
r[i] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
}
}
if (ctx->Pixel.FragmentAlphaSource == GL_CURRENT_RASTER_COLOR) {
GLuint i;
for (i = 0; i < n; i++) {
q[i] = ctx->Current.RasterColor[ACOMP];
}
}
else {
GLuint i;
ASSERT(ctx->Pixel.FragmentAlphaSource == GL_PIXEL_GROUP_COLOR_SGIS);
for (i = 0; i < n; i++) {
q[i] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
}
}
}
/**
* Apply texture mapping to a span of fragments.
*/
void
_swrast_texture_span( GLcontext *ctx, SWspan *span )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat primary_rgba[MAX_WIDTH][4];
GLuint unit;
ASSERT(span->end <= MAX_WIDTH);
/*
* Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
*/
if (swrast->_TextureCombinePrimary) {
GLuint i;
for (i = 0; i < span->end; i++) {
primary_rgba[i][RCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]);
primary_rgba[i][GCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]);
primary_rgba[i][BCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]);
primary_rgba[i][ACOMP] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]);
}
}
/* First must sample all bump maps */
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
if (texUnit->_ReallyEnabled &&
texUnit->_CurrentCombine->ModeRGB == GL_BUMP_ENVMAP_ATI) {
const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
span->array->attribs[FRAG_ATTRIB_TEX0 + unit];
float4_array targetcoords =
span->array->attribs[FRAG_ATTRIB_TEX0 +
ctx->Texture.Unit[unit].BumpTarget - GL_TEXTURE0];
const struct gl_texture_object *curObj = texUnit->_Current;
GLfloat *lambda = span->array->lambda[unit];
float4_array texels = get_texel_array(swrast, unit);
GLuint i;
GLfloat rotMatrix00 = ctx->Texture.Unit[unit].RotMatrix[0];
GLfloat rotMatrix01 = ctx->Texture.Unit[unit].RotMatrix[1];
GLfloat rotMatrix10 = ctx->Texture.Unit[unit].RotMatrix[2];
GLfloat rotMatrix11 = ctx->Texture.Unit[unit].RotMatrix[3];
/* adjust texture lod (lambda) */
if (span->arrayMask & SPAN_LAMBDA) {
if (texUnit->LodBias + curObj->LodBias != 0.0F) {
/* apply LOD bias, but don't clamp yet */
const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias,
-ctx->Const.MaxTextureLodBias,
ctx->Const.MaxTextureLodBias);
GLuint i;
for (i = 0; i < span->end; i++) {
lambda[i] += bias;
}
}
if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) {
/* apply LOD clamping to lambda */
const GLfloat min = curObj->MinLod;
const GLfloat max = curObj->MaxLod;
GLuint i;
for (i = 0; i < span->end; i++) {
GLfloat l = lambda[i];
lambda[i] = CLAMP(l, min, max);
}
}
}
/* Sample the texture (span->end = number of fragments) */
swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end,
texcoords, lambda, texels );
/* manipulate the span values of the bump target
not sure this can work correctly even ignoring
the problem that channel is unsigned */
for (i = 0; i < span->end; i++) {
targetcoords[i][0] += (texels[i][0] * rotMatrix00 + texels[i][1] *
rotMatrix01) / targetcoords[i][3];
targetcoords[i][1] += (texels[i][0] * rotMatrix10 + texels[i][1] *
rotMatrix11) / targetcoords[i][3];
}
}
}
/*
* Must do all texture sampling before combining in order to
* accomodate GL_ARB_texture_env_crossbar.
*/
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
if (texUnit->_ReallyEnabled &&
texUnit->_CurrentCombine->ModeRGB != GL_BUMP_ENVMAP_ATI) {
const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
span->array->attribs[FRAG_ATTRIB_TEX0 + unit];
const struct gl_texture_object *curObj = texUnit->_Current;
GLfloat *lambda = span->array->lambda[unit];
float4_array texels = get_texel_array(swrast, unit);
/* adjust texture lod (lambda) */
if (span->arrayMask & SPAN_LAMBDA) {
if (texUnit->LodBias + curObj->LodBias != 0.0F) {
/* apply LOD bias, but don't clamp yet */
const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias,
-ctx->Const.MaxTextureLodBias,
ctx->Const.MaxTextureLodBias);
GLuint i;
for (i = 0; i < span->end; i++) {
lambda[i] += bias;
}
}
if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) {
/* apply LOD clamping to lambda */
const GLfloat min = curObj->MinLod;
const GLfloat max = curObj->MaxLod;
GLuint i;
for (i = 0; i < span->end; i++) {
GLfloat l = lambda[i];
lambda[i] = CLAMP(l, min, max);
}
}
}
/* Sample the texture (span->end = number of fragments) */
swrast->TextureSample[unit]( ctx, texUnit->_Current, span->end,
texcoords, lambda, texels );
/* GL_SGI_texture_color_table */
if (texUnit->ColorTableEnabled) {
_mesa_lookup_rgba_float(&texUnit->ColorTable, span->end, texels);
}
/* GL_EXT_texture_swizzle */
if (curObj->_Swizzle != SWIZZLE_NOOP) {
swizzle_texels(curObj->_Swizzle, span->end, texels);
}
}
}
/*
* OK, now apply the texture (aka texture combine/blend).
* We modify the span->color.rgba values.
*/
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled) {
texture_combine( ctx, unit, span->end,
primary_rgba,
swrast->TexelBuffer,
span->array->rgba );
}
}
}
/**
* Do texture application for:
* GL_EXT_texture_env_combine
* GL_ARB_texture_env_combine
* GL_EXT_texture_env_dot3
* GL_ARB_texture_env_dot3
* GL_ATI_texture_env_combine3
* GL_NV_texture_env_combine4
* conventional GL texture env modes
*
* \param ctx rendering context
* \param unit the texture combiner unit
* \param primary_rgba incoming fragment color array
* \param texelBuffer pointer to texel colors for all texture units
*
* \param span two fields are used in this function:
* span->end: number of fragments to process
* span->array->rgba: incoming/result fragment colors
*/
static void
texture_combine( struct gl_context *ctx, GLuint unit,
const float4_array primary_rgba,
const GLfloat *texelBuffer,
SWspan *span )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]);
const struct gl_tex_env_combine_state *combine = textureUnit->_CurrentCombine;
float4_array argRGB[MAX_COMBINER_TERMS];
float4_array argA[MAX_COMBINER_TERMS];
const GLfloat scaleRGB = (GLfloat) (1 << combine->ScaleShiftRGB);
const GLfloat scaleA = (GLfloat) (1 << combine->ScaleShiftA);
const GLuint numArgsRGB = combine->_NumArgsRGB;
const GLuint numArgsA = combine->_NumArgsA;
float4_array ccolor[4], rgba;
GLuint i, term;
GLuint n = span->end;
GLchan (*rgbaChan)[4] = span->array->rgba;
/* alloc temp pixel buffers */
rgba = malloc(4 * n * sizeof(GLfloat));
if (!rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
return;
}
for (i = 0; i < numArgsRGB || i < numArgsA; i++) {
ccolor[i] = malloc(4 * n * sizeof(GLfloat));
if (!ccolor[i]) {
while (i) {
free(ccolor[i]);
i--;
}
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
free(rgba);
return;
}
}
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = CHAN_TO_FLOAT(rgbaChan[i][RCOMP]);
rgba[i][GCOMP] = CHAN_TO_FLOAT(rgbaChan[i][GCOMP]);
rgba[i][BCOMP] = CHAN_TO_FLOAT(rgbaChan[i][BCOMP]);
rgba[i][ACOMP] = CHAN_TO_FLOAT(rgbaChan[i][ACOMP]);
}
/*
printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n",
combine->ModeRGB,
combine->ModeA,
combine->SourceRGB[0],
combine->SourceA[0],
combine->SourceRGB[1],
combine->SourceA[1]);
*/
/*
* Do operand setup for up to 4 operands. Loop over the terms.
*/
for (term = 0; term < numArgsRGB; term++) {
const GLenum srcRGB = combine->SourceRGB[term];
const GLenum operandRGB = combine->OperandRGB[term];
switch (srcRGB) {
case GL_TEXTURE:
argRGB[term] = get_texel_array(swrast, unit);
break;
case GL_PRIMARY_COLOR:
argRGB[term] = primary_rgba;
break;
case GL_PREVIOUS:
argRGB[term] = rgba;
break;
case GL_CONSTANT:
{
float4_array c = ccolor[term];
GLfloat red = textureUnit->EnvColor[0];
GLfloat green = textureUnit->EnvColor[1];
GLfloat blue = textureUnit->EnvColor[2];
GLfloat alpha = textureUnit->EnvColor[3];
for (i = 0; i < n; i++) {
ASSIGN_4V(c[i], red, green, blue, alpha);
}
argRGB[term] = ccolor[term];
}
break;
/* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
*/
case GL_ZERO:
{
float4_array c = ccolor[term];
for (i = 0; i < n; i++) {
ASSIGN_4V(c[i], 0.0F, 0.0F, 0.0F, 0.0F);
}
argRGB[term] = ccolor[term];
}
break;
case GL_ONE:
{
float4_array c = ccolor[term];
for (i = 0; i < n; i++) {
ASSIGN_4V(c[i], 1.0F, 1.0F, 1.0F, 1.0F);
}
argRGB[term] = ccolor[term];
}
break;
default:
/* ARB_texture_env_crossbar source */
{
const GLuint srcUnit = srcRGB - GL_TEXTURE0;
ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
goto end;
argRGB[term] = get_texel_array(swrast, srcUnit);
}
}
if (operandRGB != GL_SRC_COLOR) {
float4_array src = argRGB[term];
float4_array dst = ccolor[term];
/* point to new arg[term] storage */
argRGB[term] = ccolor[term];
switch (operandRGB) {
case GL_ONE_MINUS_SRC_COLOR:
for (i = 0; i < n; i++) {
dst[i][RCOMP] = 1.0F - src[i][RCOMP];
dst[i][GCOMP] = 1.0F - src[i][GCOMP];
dst[i][BCOMP] = 1.0F - src[i][BCOMP];
}
break;
case GL_SRC_ALPHA:
for (i = 0; i < n; i++) {
dst[i][RCOMP] =
dst[i][GCOMP] =
dst[i][BCOMP] = src[i][ACOMP];
}
break;
case GL_ONE_MINUS_SRC_ALPHA:
for (i = 0; i < n; i++) {
dst[i][RCOMP] =
dst[i][GCOMP] =
dst[i][BCOMP] = 1.0F - src[i][ACOMP];
}
break;
default:
_mesa_problem(ctx, "Bad operandRGB");
}
}
}
/*
* Set up the argA[term] pointers
*/
for (term = 0; term < numArgsA; term++) {
const GLenum srcA = combine->SourceA[term];
const GLenum operandA = combine->OperandA[term];
switch (srcA) {
case GL_TEXTURE:
argA[term] = get_texel_array(swrast, unit);
break;
case GL_PRIMARY_COLOR:
argA[term] = primary_rgba;
break;
case GL_PREVIOUS:
argA[term] = rgba;
break;
case GL_CONSTANT:
{
float4_array c = ccolor[term];
GLfloat alpha = textureUnit->EnvColor[3];
for (i = 0; i < n; i++)
c[i][ACOMP] = alpha;
argA[term] = ccolor[term];
}
break;
/* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources.
*/
case GL_ZERO:
{
float4_array c = ccolor[term];
for (i = 0; i < n; i++)
c[i][ACOMP] = 0.0F;
argA[term] = ccolor[term];
}
break;
case GL_ONE:
{
float4_array c = ccolor[term];
for (i = 0; i < n; i++)
c[i][ACOMP] = 1.0F;
argA[term] = ccolor[term];
}
break;
default:
/* ARB_texture_env_crossbar source */
{
const GLuint srcUnit = srcA - GL_TEXTURE0;
ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
goto end;
argA[term] = get_texel_array(swrast, srcUnit);
}
}
if (operandA == GL_ONE_MINUS_SRC_ALPHA) {
float4_array src = argA[term];
float4_array dst = ccolor[term];
argA[term] = ccolor[term];
for (i = 0; i < n; i++) {
dst[i][ACOMP] = 1.0F - src[i][ACOMP];
}
}
}
/* RGB channel combine */
{
float4_array arg0 = argRGB[0];
float4_array arg1 = argRGB[1];
float4_array arg2 = argRGB[2];
float4_array arg3 = argRGB[3];
switch (combine->ModeRGB) {
case GL_REPLACE:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = arg0[i][RCOMP] * scaleRGB;
rgba[i][GCOMP] = arg0[i][GCOMP] * scaleRGB;
rgba[i][BCOMP] = arg0[i][BCOMP] * scaleRGB;
}
break;
case GL_MODULATE:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * scaleRGB;
rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * scaleRGB;
rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * scaleRGB;
}
break;
case GL_ADD:
if (textureUnit->EnvMode == GL_COMBINE4_NV) {
/* (a * b) + (c * d) */
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] +
arg2[i][RCOMP] * arg3[i][RCOMP]) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] +
arg2[i][GCOMP] * arg3[i][GCOMP]) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] +
arg2[i][BCOMP] * arg3[i][BCOMP]) * scaleRGB;
}
}
else {
/* 2-term addition */
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * scaleRGB;
}
}
break;
case GL_ADD_SIGNED:
if (textureUnit->EnvMode == GL_COMBINE4_NV) {
/* (a * b) + (c * d) - 0.5 */
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] * arg1[i][RCOMP] +
arg2[i][RCOMP] * arg3[i][RCOMP] - 0.5F) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] * arg1[i][GCOMP] +
arg2[i][GCOMP] * arg3[i][GCOMP] - 0.5F) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] * arg1[i][BCOMP] +
arg2[i][BCOMP] * arg3[i][BCOMP] - 0.5F) * scaleRGB;
}
}
else {
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5F) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5F) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5F) * scaleRGB;
}
}
break;
case GL_INTERPOLATE:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] +
arg1[i][RCOMP] * (1.0F - arg2[i][RCOMP])) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] +
arg1[i][GCOMP] * (1.0F - arg2[i][GCOMP])) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] +
arg1[i][BCOMP] * (1.0F - arg2[i][BCOMP])) * scaleRGB;
}
break;
case GL_SUBTRACT:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * scaleRGB;
rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * scaleRGB;
rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * scaleRGB;
}
break;
case GL_DOT3_RGB_EXT:
case GL_DOT3_RGBA_EXT:
/* Do not scale the result by 1 2 or 4 */
for (i = 0; i < n; i++) {
GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) +
(arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) +
(arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F))
* 4.0F;
dot = CLAMP(dot, 0.0F, 1.0F);
rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot;
}
break;
case GL_DOT3_RGB:
case GL_DOT3_RGBA:
/* DO scale the result by 1 2 or 4 */
for (i = 0; i < n; i++) {
GLfloat dot = ((arg0[i][RCOMP] - 0.5F) * (arg1[i][RCOMP] - 0.5F) +
(arg0[i][GCOMP] - 0.5F) * (arg1[i][GCOMP] - 0.5F) +
(arg0[i][BCOMP] - 0.5F) * (arg1[i][BCOMP] - 0.5F))
* 4.0F * scaleRGB;
dot = CLAMP(dot, 0.0F, 1.0F);
rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = dot;
}
break;
case GL_MODULATE_ADD_ATI:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) +
arg1[i][RCOMP]) * scaleRGB;
rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) +
arg1[i][GCOMP]) * scaleRGB;
rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) +
arg1[i][BCOMP]) * scaleRGB;
}
break;
case GL_MODULATE_SIGNED_ADD_ATI:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) +
arg1[i][RCOMP] - 0.5F) * scaleRGB;
rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) +
arg1[i][GCOMP] - 0.5F) * scaleRGB;
rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) +
arg1[i][BCOMP] - 0.5F) * scaleRGB;
}
break;
case GL_MODULATE_SUBTRACT_ATI:
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) -
arg1[i][RCOMP]) * scaleRGB;
rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) -
arg1[i][GCOMP]) * scaleRGB;
rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) -
arg1[i][BCOMP]) * scaleRGB;
}
break;
case GL_BUMP_ENVMAP_ATI:
/* this produces a fixed rgba color, and the coord calc is done elsewhere */
for (i = 0; i < n; i++) {
/* rgba result is 0,0,0,1 */
rgba[i][RCOMP] = 0.0;
rgba[i][GCOMP] = 0.0;
rgba[i][BCOMP] = 0.0;
rgba[i][ACOMP] = 1.0;
}
goto end; /* no alpha processing */
default:
_mesa_problem(ctx, "invalid combine mode");
}
}
/* Alpha channel combine */
{
float4_array arg0 = argA[0];
float4_array arg1 = argA[1];
float4_array arg2 = argA[2];
float4_array arg3 = argA[3];
switch (combine->ModeA) {
case GL_REPLACE:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = arg0[i][ACOMP] * scaleA;
}
break;
case GL_MODULATE:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * scaleA;
}
break;
case GL_ADD:
if (textureUnit->EnvMode == GL_COMBINE4_NV) {
/* (a * b) + (c * d) */
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] +
arg2[i][ACOMP] * arg3[i][ACOMP]) * scaleA;
}
}
else {
/* two-term add */
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * scaleA;
}
}
break;
case GL_ADD_SIGNED:
if (textureUnit->EnvMode == GL_COMBINE4_NV) {
/* (a * b) + (c * d) - 0.5 */
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] * arg1[i][ACOMP] +
arg2[i][ACOMP] * arg3[i][ACOMP] -
0.5F) * scaleA;
}
}
else {
/* a + b - 0.5 */
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * scaleA;
}
}
break;
case GL_INTERPOLATE:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] +
arg1[i][ACOMP] * (1.0F - arg2[i][ACOMP]))
* scaleA;
}
break;
case GL_SUBTRACT:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * scaleA;
}
break;
case GL_MODULATE_ADD_ATI:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP])
+ arg1[i][ACOMP]) * scaleA;
}
break;
case GL_MODULATE_SIGNED_ADD_ATI:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) +
arg1[i][ACOMP] - 0.5F) * scaleA;
}
break;
case GL_MODULATE_SUBTRACT_ATI:
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP])
- arg1[i][ACOMP]) * scaleA;
}
break;
default:
_mesa_problem(ctx, "invalid combine mode");
}
}
/* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining.
* This is kind of a kludge. It would have been better if the spec
* were written such that the GL_COMBINE_ALPHA value could be set to
* GL_DOT3.
*/
if (combine->ModeRGB == GL_DOT3_RGBA_EXT ||
combine->ModeRGB == GL_DOT3_RGBA) {
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = rgba[i][RCOMP];
}
}
for (i = 0; i < n; i++) {
UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][RCOMP], rgba[i][RCOMP]);
UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][GCOMP], rgba[i][GCOMP]);
UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][BCOMP], rgba[i][BCOMP]);
UNCLAMPED_FLOAT_TO_CHAN(rgbaChan[i][ACOMP], rgba[i][ACOMP]);
}
/* The span->array->rgba values are of CHAN type so set
* span->array->ChanType field accordingly.
*/
span->array->ChanType = CHAN_TYPE;
end:
for (i = 0; i < numArgsRGB || i < numArgsA; i++) {
free(ccolor[i]);
}
free(rgba);
}
/**
* Apply texture mapping to a span of fragments.
*/
void
_swrast_texture_span( struct gl_context *ctx, SWspan *span )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
float4_array primary_rgba;
GLuint unit;
if (!swrast->TexelBuffer) {
#ifdef _OPENMP
const GLint maxThreads = omp_get_max_threads();
#else
const GLint maxThreads = 1;
#endif
/* TexelBuffer is also global and normally shared by all SWspan
* instances; when running with multiple threads, create one per
* thread.
*/
swrast->TexelBuffer =
malloc(ctx->Const.FragmentProgram.MaxTextureImageUnits * maxThreads *
SWRAST_MAX_WIDTH * 4 * sizeof(GLfloat));
if (!swrast->TexelBuffer) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
return;
}
}
primary_rgba = malloc(span->end * 4 * sizeof(GLfloat));
if (!primary_rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_span");
return;
}
ASSERT(span->end <= SWRAST_MAX_WIDTH);
/*
* Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
*/
if (swrast->_TextureCombinePrimary) {
GLuint i;
for (i = 0; i < span->end; i++) {
primary_rgba[i][RCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]);
primary_rgba[i][GCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]);
primary_rgba[i][BCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]);
primary_rgba[i][ACOMP] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]);
}
}
/* First must sample all bump maps */
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
if (texUnit->_ReallyEnabled &&
texUnit->_CurrentCombine->ModeRGB == GL_BUMP_ENVMAP_ATI) {
const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
span->array->attribs[VARYING_SLOT_TEX0 + unit];
float4_array targetcoords =
span->array->attribs[VARYING_SLOT_TEX0 +
ctx->Texture.Unit[unit].BumpTarget - GL_TEXTURE0];
const struct gl_sampler_object *samp = _mesa_get_samplerobj(ctx, unit);
GLfloat *lambda = span->array->lambda[unit];
float4_array texels = get_texel_array(swrast, unit);
GLuint i;
GLfloat rotMatrix00 = ctx->Texture.Unit[unit].RotMatrix[0];
GLfloat rotMatrix01 = ctx->Texture.Unit[unit].RotMatrix[1];
GLfloat rotMatrix10 = ctx->Texture.Unit[unit].RotMatrix[2];
GLfloat rotMatrix11 = ctx->Texture.Unit[unit].RotMatrix[3];
/* adjust texture lod (lambda) */
if (span->arrayMask & SPAN_LAMBDA) {
if (texUnit->LodBias + samp->LodBias != 0.0F) {
/* apply LOD bias, but don't clamp yet */
const GLfloat bias = CLAMP(texUnit->LodBias + samp->LodBias,
-ctx->Const.MaxTextureLodBias,
ctx->Const.MaxTextureLodBias);
GLuint i;
for (i = 0; i < span->end; i++) {
lambda[i] += bias;
}
}
if (samp->MinLod != -1000.0 ||
samp->MaxLod != 1000.0) {
/* apply LOD clamping to lambda */
const GLfloat min = samp->MinLod;
const GLfloat max = samp->MaxLod;
GLuint i;
for (i = 0; i < span->end; i++) {
GLfloat l = lambda[i];
lambda[i] = CLAMP(l, min, max);
}
}
}
/* Sample the texture (span->end = number of fragments) */
swrast->TextureSample[unit]( ctx, samp,
ctx->Texture.Unit[unit]._Current,
span->end, texcoords, lambda, texels );
/* manipulate the span values of the bump target
not sure this can work correctly even ignoring
the problem that channel is unsigned */
for (i = 0; i < span->end; i++) {
targetcoords[i][0] += (texels[i][0] * rotMatrix00 + texels[i][1] *
rotMatrix01) / targetcoords[i][3];
targetcoords[i][1] += (texels[i][0] * rotMatrix10 + texels[i][1] *
rotMatrix11) / targetcoords[i][3];
}
}
}
/*
* Must do all texture sampling before combining in order to
* accomodate GL_ARB_texture_env_crossbar.
*/
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
if (texUnit->_ReallyEnabled &&
texUnit->_CurrentCombine->ModeRGB != GL_BUMP_ENVMAP_ATI) {
const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
span->array->attribs[VARYING_SLOT_TEX0 + unit];
const struct gl_texture_object *curObj = texUnit->_Current;
const struct gl_sampler_object *samp = _mesa_get_samplerobj(ctx, unit);
GLfloat *lambda = span->array->lambda[unit];
float4_array texels = get_texel_array(swrast, unit);
/* adjust texture lod (lambda) */
if (span->arrayMask & SPAN_LAMBDA) {
if (texUnit->LodBias + samp->LodBias != 0.0F) {
/* apply LOD bias, but don't clamp yet */
const GLfloat bias = CLAMP(texUnit->LodBias + samp->LodBias,
-ctx->Const.MaxTextureLodBias,
ctx->Const.MaxTextureLodBias);
GLuint i;
for (i = 0; i < span->end; i++) {
lambda[i] += bias;
}
}
if (samp->MinLod != -1000.0 ||
samp->MaxLod != 1000.0) {
/* apply LOD clamping to lambda */
const GLfloat min = samp->MinLod;
const GLfloat max = samp->MaxLod;
GLuint i;
for (i = 0; i < span->end; i++) {
GLfloat l = lambda[i];
lambda[i] = CLAMP(l, min, max);
}
}
}
else if (samp->MaxAnisotropy > 1.0 &&
samp->MinFilter == GL_LINEAR_MIPMAP_LINEAR) {
/* sample_lambda_2d_aniso is beeing used as texture_sample_func,
* it requires the current SWspan *span as an additional parameter.
* In order to keep the same function signature, the unused lambda
* parameter will be modified to actually contain the SWspan pointer.
* This is a Hack. To make it right, the texture_sample_func
* signature and all implementing functions need to be modified.
*/
/* "hide" SWspan struct; cast to (GLfloat *) to suppress warning */
lambda = (GLfloat *)span;
}
/* Sample the texture (span->end = number of fragments) */
swrast->TextureSample[unit]( ctx, samp,
ctx->Texture.Unit[unit]._Current,
span->end, texcoords, lambda, texels );
/* GL_EXT_texture_swizzle */
if (curObj->_Swizzle != SWIZZLE_NOOP) {
swizzle_texels(curObj->_Swizzle, span->end, texels);
}
}
}
/*
* OK, now apply the texture (aka texture combine/blend).
* We modify the span->color.rgba values.
*/
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled)
texture_combine(ctx, unit, primary_rgba, swrast->TexelBuffer, span);
}
free(primary_rgba);
}
static void
pop_texture_group(GLcontext *ctx, const struct gl_texture_attrib *texAttrib)
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
const struct gl_texture_unit *unit = &texAttrib->Unit[u];
GLuint i;
_mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
_mesa_set_enable(ctx, GL_TEXTURE_1D,
(GLboolean) (unit->Enabled & TEXTURE0_1D ? GL_TRUE : GL_FALSE));
_mesa_set_enable(ctx, GL_TEXTURE_2D,
(GLboolean) (unit->Enabled & TEXTURE0_2D ? GL_TRUE : GL_FALSE));
_mesa_set_enable(ctx, GL_TEXTURE_3D,
(GLboolean) (unit->Enabled & TEXTURE0_3D ? GL_TRUE : GL_FALSE));
if (ctx->Extensions.ARB_texture_cube_map) {
_mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
(GLboolean) (unit->Enabled & TEXTURE0_CUBE ? GL_TRUE : GL_FALSE));
}
if (ctx->Extensions.NV_texture_rectangle) {
_mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
(GLboolean) (unit->Enabled & TEXTURE0_RECT ? GL_TRUE : GL_FALSE));
}
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
_mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
_mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenModeS);
_mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenModeT);
_mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenModeR);
_mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenModeQ);
_mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->ObjectPlaneS);
_mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->ObjectPlaneT);
_mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->ObjectPlaneR);
_mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->ObjectPlaneQ);
_mesa_TexGenfv(GL_S, GL_EYE_PLANE, unit->EyePlaneS);
_mesa_TexGenfv(GL_T, GL_EYE_PLANE, unit->EyePlaneT);
_mesa_TexGenfv(GL_R, GL_EYE_PLANE, unit->EyePlaneR);
_mesa_TexGenfv(GL_Q, GL_EYE_PLANE, unit->EyePlaneQ);
if (ctx->Extensions.EXT_texture_lod_bias) {
_mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
}
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT,
unit->CombineModeRGB);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_EXT,
unit->CombineModeA);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT,
unit->CombineSourceRGB[0]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT,
unit->CombineSourceRGB[1]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_EXT,
unit->CombineSourceRGB[2]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_EXT,
unit->CombineSourceA[0]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_EXT,
unit->CombineSourceA[1]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_EXT,
unit->CombineSourceA[2]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_EXT,
unit->CombineOperandRGB[0]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_EXT,
unit->CombineOperandRGB[1]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_EXT,
unit->CombineOperandRGB[2]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_EXT,
unit->CombineOperandA[0]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_EXT,
unit->CombineOperandA[1]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_EXT,
unit->CombineOperandA[2]);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_EXT,
1 << unit->CombineScaleShiftRGB);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
1 << unit->CombineScaleShiftA);
}
/* Restore texture object state */
for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
GLenum target = 0;
const struct gl_texture_object *obj = NULL;
GLfloat bordColor[4];
switch (i) {
case 0:
target = GL_TEXTURE_1D;
obj = &unit->Saved1D;
break;
case 1:
target = GL_TEXTURE_2D;
obj = &unit->Saved2D;
break;
case 2:
target = GL_TEXTURE_3D;
obj = &unit->Saved3D;
break;
case 3:
if (!ctx->Extensions.ARB_texture_cube_map)
continue;
target = GL_TEXTURE_CUBE_MAP_ARB;
obj = &unit->SavedCubeMap;
break;
case 4:
if (!ctx->Extensions.NV_texture_rectangle)
continue;
target = GL_TEXTURE_RECTANGLE_NV;
obj = &unit->SavedRect;
break;
default:
; /* silence warnings */
}
_mesa_BindTexture(target, obj->Name);
bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
_mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
_mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
_mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
_mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
_mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
_mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
_mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
_mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
_mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
_mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
if (ctx->Extensions.EXT_texture_filter_anisotropic) {
_mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
obj->MaxAnisotropy);
}
if (ctx->Extensions.SGIX_shadow) {
_mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
obj->CompareFlag);
_mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
obj->CompareOperator);
}
if (ctx->Extensions.SGIX_shadow_ambient) {
_mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
CHAN_TO_FLOAT(obj->ShadowAmbient));
}
}
}
_mesa_ActiveTextureARB(GL_TEXTURE0_ARB
+ texAttrib->CurrentUnit);
/* "un-bump" the texture object reference counts. We did that so they
* wouldn't inadvertantly get deleted while they were still referenced
* inside the attribute state stack.
*/
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
ctx->Texture.Unit[u].Current1D->RefCount--;
ctx->Texture.Unit[u].Current2D->RefCount--;
ctx->Texture.Unit[u].Current3D->RefCount--;
ctx->Texture.Unit[u].CurrentCubeMap->RefCount--;
ctx->Texture.Unit[u].CurrentRect->RefCount--;
}
}
/*
* This function is kind of long just because we have to call a lot
* of device driver functions to update device driver state.
*
* XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
* in order to restore GL state. This isn't terribly efficient but it
* ensures that dirty flags and any derived state gets updated correctly.
* We could at least check if the value to restore equals the current value
* and then skip the Mesa call.
*/
void
_mesa_PopAttrib(void)
{
struct gl_attrib_node *attr, *next;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (ctx->AttribStackDepth == 0) {
_mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
return;
}
ctx->AttribStackDepth--;
attr = ctx->AttribStack[ctx->AttribStackDepth];
while (attr) {
if (MESA_VERBOSE&VERBOSE_API) {
fprintf(stderr, "glPopAttrib %s\n",
_mesa_lookup_enum_by_nr(attr->kind));
}
switch (attr->kind) {
case GL_ACCUM_BUFFER_BIT:
{
const struct gl_accum_attrib *accum;
accum = (const struct gl_accum_attrib *) attr->data;
_mesa_ClearAccum(accum->ClearColor[0],
accum->ClearColor[1],
accum->ClearColor[2],
accum->ClearColor[3]);
}
break;
case GL_COLOR_BUFFER_BIT:
{
const struct gl_colorbuffer_attrib *color;
color = (const struct gl_colorbuffer_attrib *) attr->data;
_mesa_ClearIndex((GLfloat) color->ClearIndex);
_mesa_ClearColor(CHAN_TO_FLOAT(color->ClearColor[0]),
CHAN_TO_FLOAT(color->ClearColor[1]),
CHAN_TO_FLOAT(color->ClearColor[2]),
CHAN_TO_FLOAT(color->ClearColor[3]));
_mesa_IndexMask(color->IndexMask);
_mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
(GLboolean) (color->ColorMask[1] != 0),
(GLboolean) (color->ColorMask[2] != 0),
(GLboolean) (color->ColorMask[3] != 0));
_mesa_DrawBuffer(color->DrawBuffer);
_mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
_mesa_AlphaFunc(color->AlphaFunc,
CHAN_TO_FLOAT(color->AlphaRef));
_mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
_mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
color->BlendDstRGB,
color->BlendSrcA,
color->BlendDstA);
_mesa_BlendEquation(color->BlendEquation);
_mesa_BlendColor(color->BlendColor[0],
color->BlendColor[1],
color->BlendColor[2],
color->BlendColor[3]);
_mesa_LogicOp(color->LogicOp);
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
color->ColorLogicOpEnabled);
_mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
color->IndexLogicOpEnabled);
_mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
}
break;
case GL_CURRENT_BIT:
FLUSH_CURRENT( ctx, 0 );
MEMCPY( &ctx->Current, attr->data,
sizeof(struct gl_current_attrib) );
break;
case GL_DEPTH_BUFFER_BIT:
{
const struct gl_depthbuffer_attrib *depth;
depth = (const struct gl_depthbuffer_attrib *) attr->data;
_mesa_DepthFunc(depth->Func);
_mesa_ClearDepth(depth->Clear);
_mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
_mesa_DepthMask(depth->Mask);
if (ctx->Extensions.HP_occlusion_test)
_mesa_set_enable(ctx, GL_OCCLUSION_TEST_HP,
depth->OcclusionTest);
}
break;
case GL_ENABLE_BIT:
{
const struct gl_enable_attrib *enable;
enable = (const struct gl_enable_attrib *) attr->data;
pop_enable_group(ctx, enable);
ctx->NewState |= _NEW_ALL;
}
break;
case GL_EVAL_BIT:
MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
ctx->NewState |= _NEW_EVAL;
break;
case GL_FOG_BIT:
{
const struct gl_fog_attrib *fog;
fog = (const struct gl_fog_attrib *) attr->data;
_mesa_set_enable(ctx, GL_FOG, fog->Enabled);
_mesa_Fogfv(GL_FOG_COLOR, fog->Color);
_mesa_Fogf(GL_FOG_DENSITY, fog->Density);
_mesa_Fogf(GL_FOG_START, fog->Start);
_mesa_Fogf(GL_FOG_END, fog->End);
_mesa_Fogf(GL_FOG_INDEX, fog->Index);
_mesa_Fogi(GL_FOG_MODE, fog->Mode);
}
break;
case GL_HINT_BIT:
{
const struct gl_hint_attrib *hint;
hint = (const struct gl_hint_attrib *) attr->data;
_mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
hint->PerspectiveCorrection );
_mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
_mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
_mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
_mesa_Hint(GL_FOG_HINT, hint->Fog);
_mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
hint->ClipVolumeClipping);
if (ctx->Extensions.ARB_texture_compression)
_mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
hint->TextureCompression);
}
break;
case GL_LIGHTING_BIT:
{
GLuint i;
const struct gl_light_attrib *light;
light = (const struct gl_light_attrib *) attr->data;
/* lighting enable */
_mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
/* per-light state */
if (ctx->ModelView.flags & MAT_DIRTY_INVERSE)
_math_matrix_analyse( &ctx->ModelView );
for (i = 0; i < MAX_LIGHTS; i++) {
GLenum lgt = (GLenum) (GL_LIGHT0 + i);
const struct gl_light *l = &light->Light[i];
GLfloat tmp[4];
_mesa_set_enable(ctx, lgt, l->Enabled);
_mesa_Lightfv( lgt, GL_AMBIENT, l->Ambient );
_mesa_Lightfv( lgt, GL_DIFFUSE, l->Diffuse );
_mesa_Lightfv( lgt, GL_SPECULAR, l->Specular );
TRANSFORM_POINT( tmp, ctx->ModelView.inv, l->EyePosition );
_mesa_Lightfv( lgt, GL_POSITION, tmp );
TRANSFORM_POINT( tmp, ctx->ModelView.m, l->EyeDirection );
_mesa_Lightfv( lgt, GL_SPOT_DIRECTION, tmp );
_mesa_Lightfv( lgt, GL_SPOT_EXPONENT, &l->SpotExponent );
_mesa_Lightfv( lgt, GL_SPOT_CUTOFF, &l->SpotCutoff );
_mesa_Lightfv( lgt, GL_CONSTANT_ATTENUATION,
&l->ConstantAttenuation );
_mesa_Lightfv( lgt, GL_LINEAR_ATTENUATION,
&l->LinearAttenuation );
_mesa_Lightfv( lgt, GL_QUADRATIC_ATTENUATION,
&l->QuadraticAttenuation );
}
/* light model */
_mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
light->Model.Ambient);
_mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
(GLfloat) light->Model.LocalViewer);
_mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
(GLfloat) light->Model.TwoSide);
_mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
(GLfloat) light->Model.ColorControl);
/* materials */
MEMCPY(ctx->Light.Material, light->Material,
2 * sizeof(struct gl_material));
/* shade model */
_mesa_ShadeModel(light->ShadeModel);
/* color material */
_mesa_ColorMaterial(light->ColorMaterialFace,
light->ColorMaterialMode);
_mesa_set_enable(ctx, GL_COLOR_MATERIAL,
light->ColorMaterialEnabled);
}
break;
case GL_LINE_BIT:
{
const struct gl_line_attrib *line;
line = (const struct gl_line_attrib *) attr->data;
_mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
_mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
_mesa_LineStipple(line->StippleFactor, line->StipplePattern);
_mesa_LineWidth(line->Width);
}
break;
case GL_LIST_BIT:
MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
break;
case GL_PIXEL_MODE_BIT:
MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
ctx->NewState |= _NEW_PIXEL;
break;
case GL_POINT_BIT:
{
const struct gl_point_attrib *point;
point = (const struct gl_point_attrib *) attr->data;
_mesa_PointSize(point->Size);
_mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
if (ctx->Extensions.EXT_point_parameters) {
_mesa_PointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
point->Params);
_mesa_PointParameterfEXT(GL_POINT_SIZE_MIN_EXT,
point->MinSize);
_mesa_PointParameterfEXT(GL_POINT_SIZE_MAX_EXT,
point->MaxSize);
_mesa_PointParameterfEXT(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
point->Threshold);
}
}
break;
case GL_POLYGON_BIT:
{
const struct gl_polygon_attrib *polygon;
polygon = (const struct gl_polygon_attrib *) attr->data;
_mesa_CullFace(polygon->CullFaceMode);
_mesa_FrontFace(polygon->FrontFace);
_mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
_mesa_PolygonMode(GL_BACK, polygon->BackMode);
_mesa_PolygonOffset(polygon->OffsetFactor,
polygon->OffsetUnits);
_mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
_mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
_mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
polygon->OffsetPoint);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
polygon->OffsetLine);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
polygon->OffsetFill);
}
break;
case GL_POLYGON_STIPPLE_BIT:
MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
ctx->NewState |= _NEW_POLYGONSTIPPLE;
if (ctx->Driver.PolygonStipple)
ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
break;
case GL_SCISSOR_BIT:
{
const struct gl_scissor_attrib *scissor;
scissor = (const struct gl_scissor_attrib *) attr->data;
_mesa_Scissor(scissor->X, scissor->Y,
scissor->Width, scissor->Height);
_mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
}
break;
case GL_STENCIL_BUFFER_BIT:
{
const struct gl_stencil_attrib *stencil;
stencil = (const struct gl_stencil_attrib *) attr->data;
_mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
_mesa_ClearStencil(stencil->Clear);
_mesa_StencilFunc(stencil->Function, stencil->Ref,
stencil->ValueMask);
_mesa_StencilMask(stencil->WriteMask);
_mesa_StencilOp(stencil->FailFunc, stencil->ZFailFunc,
stencil->ZPassFunc);
}
break;
case GL_TRANSFORM_BIT:
{
GLuint i;
const struct gl_transform_attrib *xform;
xform = (const struct gl_transform_attrib *) attr->data;
_mesa_MatrixMode(xform->MatrixMode);
if (ctx->ProjectionMatrix.flags & MAT_DIRTY)
_math_matrix_analyse( &ctx->ProjectionMatrix );
/* restore clip planes */
for (i = 0; i < MAX_CLIP_PLANES; i++) {
const GLfloat *eyePlane = xform->EyeUserPlane[i];
COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
if (xform->ClipEnabled[i]) {
_mesa_transform_vector( ctx->Transform._ClipUserPlane[i],
eyePlane,
ctx->ProjectionMatrix.inv );
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE );
}
else {
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE );
}
if (ctx->Driver.ClipPlane)
ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
}
/* normalize/rescale */
_mesa_set_enable(ctx, GL_NORMALIZE, ctx->Transform.Normalize);
_mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
ctx->Transform.RescaleNormals);
}
break;
case GL_TEXTURE_BIT:
/* Take care of texture object reference counters */
{
const struct gl_texture_attrib *texture;
texture = (const struct gl_texture_attrib *) attr->data;
pop_texture_group(ctx, texture);
ctx->NewState |= _NEW_TEXTURE;
}
break;
case GL_VIEWPORT_BIT:
{
const struct gl_viewport_attrib *vp;
vp = (const struct gl_viewport_attrib *) attr->data;
_mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
_mesa_DepthRange(vp->Near, vp->Far);
}
break;
case GL_MULTISAMPLE_BIT_ARB:
{
const struct gl_multisample_attrib *ms;
ms = (const struct gl_multisample_attrib *) attr->data;
_mesa_SampleCoverageARB(ms->SampleCoverageValue,
ms->SampleCoverageInvert);
}
break;
default:
_mesa_problem( ctx, "Bad attrib flag in PopAttrib");
break;
}
next = attr->next;
FREE( attr->data );
FREE( attr );
attr = next;
}
}
/**
* Apply texture mapping to a span of fragments.
*/
void
_swrast_texture_span( struct gl_context *ctx, SWspan *span )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
float4_array primary_rgba;
if (!swrast->TexelBuffer) {
#ifdef _OPENMP
const GLint maxThreads = omp_get_max_threads();
#else
const GLint maxThreads = 1;
#endif
/* TexelBuffer is also global and normally shared by all SWspan
* instances; when running with multiple threads, create one per
* thread.
*/
swrast->TexelBuffer = (GLfloat *) MALLOC(maxThreads * MAX_WIDTH * 4 * sizeof(GLfloat));
if (!swrast->TexelBuffer) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
return;
}
}
primary_rgba = (float4_array) malloc(span->end * 4 * sizeof(GLfloat));
if (!primary_rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_span");
return;
}
ASSERT(span->end <= MAX_WIDTH);
/*
* Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
*/
if (swrast->_TextureCombinePrimary) {
GLuint i;
for (i = 0; i < span->end; i++) {
primary_rgba[i][RCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]);
primary_rgba[i][GCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]);
primary_rgba[i][BCOMP] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]);
primary_rgba[i][ACOMP] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]);
}
}
/*
* Must do all texture sampling before combining in order to
* accomodate GL_ARB_texture_env_crossbar.
*/
{
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit;
if (texUnit->_ReallyEnabled) {
const GLfloat (*texcoords)[4] = (const GLfloat (*)[4])
span->array->attribs[FRAG_ATTRIB_TEX];
const struct gl_texture_object *curObj = texUnit->_Current;
GLfloat *lambda = span->array->lambda;
float4_array texels = get_texel_array(swrast);
if (curObj->Sampler.MaxAnisotropy > 1.0 &&
curObj->Sampler.MinFilter == GL_LINEAR_MIPMAP_LINEAR) {
/* sample_lambda_2d_aniso is beeing used as texture_sample_func,
* it requires the current SWspan *span as an additional parameter.
* In order to keep the same function signature, the unused lambda
* parameter will be modified to actually contain the SWspan pointer.
* This is a Hack. To make it right, the texture_sample_func
* signature and all implementing functions need to be modified.
*/
/* "hide" SWspan struct; cast to (GLfloat *) to suppress warning */
lambda = (GLfloat *)span;
}
/* Sample the texture (span->end = number of fragments) */
swrast->TextureSample( ctx, texUnit->_Current, span->end,
texcoords, lambda, texels );
}
}
/*
* OK, now apply the texture (aka texture combine/blend).
* We modify the span->color.rgba values.
*/
if (ctx->Texture.Unit._ReallyEnabled)
texture_combine(ctx, primary_rgba, swrast->TexelBuffer, span);
free(primary_rgba);
}
