- /* 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_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];
- }
- }
- }
-