/**
* Make sure we have texture image data for all the textures we may need
* for subsequent rendering.
*/
static void
_swrast_validate_texture_images(GLcontext *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLuint u;
if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) {
/* no textures enabled, or no way to validate images! */
return;
}
for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
if (ctx->Texture.Unit[u]._ReallyEnabled) {
struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
ASSERT(texObj);
if (texObj) {
GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
GLuint face;
for (face = 0; face < numFaces; face++) {
GLint lvl;
for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
struct gl_texture_image *texImg = texObj->Image[face][lvl];
if (texImg && !texImg->Data) {
swrast->ValidateTextureImage(ctx, texObj, face, lvl);
ASSERT(texObj->Image[face][lvl]->Data);
}
}
}
}
}
}
}
/**
* Called via swrast->BlendFunc. Examine GL state to choose a blending
* function, then call it.
*/
static void
_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
GLvoid *src, const GLvoid *dst,
GLenum chanType )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx ); /* why is this needed? */
_swrast_choose_blend_func( ctx, chanType );
swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
}
/**
* Called via swrast->BlendFunc. Examine GL state to choose a blending
* function, then call it.
*/
static void _ASMAPI
_swrast_validate_blend_func( GLcontext *ctx, GLuint n,
const GLubyte mask[],
GLchan src[][4],
CONST GLchan dst[][4] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
_swrast_choose_blend_func( ctx );
swrast->BlendFunc( ctx, n, mask, src, dst );
}
/**
* Called via swrast->Point. Examine current GL state and choose a software
* point routine. Then call it.
*/
static void
_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_point( ctx );
if (swrast->SpecularVertexAdd) {
swrast->SpecPoint = swrast->Point;
swrast->Point = _swrast_add_spec_terms_point;
}
swrast->Point( ctx, v0 );
}
/**
* Called via swrast->Line. Examine current GL state and choose a software
* line routine. Then call it.
*/
static void
_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_line( ctx );
assert(swrast->Line);
if (swrast->SpecularVertexAdd) {
swrast->SpecLine = swrast->Line;
swrast->Line = _swrast_add_spec_terms_line;
}
swrast->Line( ctx, v0, v1 );
}
/**
* Called via swrast->Point. Examine current GL state and choose a software
* point routine. Then call it.
*/
static void
_swrast_validate_point( GLcontext *ctx, const SWvertex *v0 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_point( ctx );
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
&& !ctx->FragmentProgram._Enabled) {
swrast->SpecPoint = swrast->Point;
swrast->Point = _swrast_add_spec_terms_point;
}
swrast->Point( ctx, v0 );
}
/**
* Called via swrast->Line. Examine current GL state and choose a software
* line routine. Then call it.
*/
static void
_swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_line( ctx );
ASSERT(swrast->Line);
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
&& !ctx->FragmentProgram._Current) {
swrast->SpecLine = swrast->Line;
swrast->Line = _swrast_add_spec_terms_line;
}
swrast->Line( ctx, v0, v1 );
}
/**
* Stub for swrast->Triangle to select a true triangle function
* after a state change.
*/
static void
_swrast_validate_triangle( struct gl_context *ctx,
const SWvertex *v0,
const SWvertex *v1,
const SWvertex *v2 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_triangle( ctx );
assert(swrast->Triangle);
if (swrast->SpecularVertexAdd) {
/* separate specular color, but no texture */
swrast->SpecTriangle = swrast->Triangle;
swrast->Triangle = _swrast_add_spec_terms_triangle;
}
swrast->Triangle( ctx, v0, v1, v2 );
}
/**
* Stub for swrast->Triangle to select a true triangle function
* after a state change.
*/
static void
_swrast_validate_triangle( GLcontext *ctx,
const SWvertex *v0,
const SWvertex *v1,
const SWvertex *v2 )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
_swrast_validate_derived( ctx );
swrast->choose_triangle( ctx );
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
&& !ctx->FragmentProgram._Enabled) {
/* separate specular color, but no texture */
swrast->SpecTriangle = swrast->Triangle;
swrast->Triangle = _swrast_add_spec_terms_triangle;
}
swrast->Triangle( ctx, v0, v1, v2 );
}
/**
* 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);
}