void
i915_upload_program(struct i915_context *i915,
struct i915_fragment_program *p)
{
GLuint program_size = p->csr - p->program;
GLuint decl_size = p->decl - p->declarations;
if (p->error)
return;
/* Could just go straight to the batchbuffer from here:
*/
if (i915->state.ProgramSize != (program_size + decl_size) ||
memcmp(i915->state.Program + decl_size, p->program,
program_size * sizeof(int)) != 0) {
I915_STATECHANGE(i915, I915_UPLOAD_PROGRAM);
memcpy(i915->state.Program, p->declarations, decl_size * sizeof(int));
memcpy(i915->state.Program + decl_size, p->program,
program_size * sizeof(int));
i915->state.ProgramSize = decl_size + program_size;
}
/* Always seemed to get a failure if I used memcmp() to
* shortcircuit this state upload. Needs further investigation?
*/
if (p->nr_constants) {
GLuint nr = p->nr_constants;
I915_ACTIVESTATE(i915, I915_UPLOAD_CONSTANTS, 1);
I915_STATECHANGE(i915, I915_UPLOAD_CONSTANTS);
i915->state.Constant[0] = _3DSTATE_PIXEL_SHADER_CONSTANTS | ((nr) * 4);
i915->state.Constant[1] = (1 << (nr - 1)) | ((1 << (nr - 1)) - 1);
memcpy(&i915->state.Constant[2], p->constant, 4 * sizeof(int) * (nr));
i915->state.ConstantSize = 2 + (nr) * 4;
if (0) {
GLuint i;
for (i = 0; i < nr; i++) {
fprintf(stderr, "const[%d]: %f %f %f %f\n", i,
p->constant[i][0],
p->constant[i][1], p->constant[i][2], p->constant[i][3]);
}
}
}
else {
I915_ACTIVESTATE(i915, I915_UPLOAD_CONSTANTS, 0);
}
p->on_hardware = 1;
}
static GLboolean enable_tex_common( GLcontext *ctx, GLuint unit )
{
i915ContextPtr i915 = I915_CONTEXT(ctx);
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *tObj = texUnit->_Current;
i915TextureObjectPtr t = (i915TextureObjectPtr)tObj->DriverData;
if (0) fprintf(stderr, "%s %d\n", __FUNCTION__, unit);
if (!(i915->state.active & I915_UPLOAD_TEX(unit))) {
I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);
}
/* Fallback if there's a texture border */
if ( tObj->Image[0][tObj->BaseLevel]->Border > 0 ) {
return GL_FALSE;
}
/* Update state if this is a different texture object to last
* time.
*/
if (i915->intel.CurrentTexObj[unit] != &t->intel ||
(t->intel.dirty & I915_UPLOAD_TEX(unit))) {
i915_import_tex_unit( i915, t, unit);
i915->tex_program.translated = 0;
}
return GL_TRUE;
}
static GLboolean disable_tex( GLcontext *ctx, GLuint unit )
{
i915ContextPtr i915 = I915_CONTEXT(ctx);
if (i915->state.active & I915_UPLOAD_TEX(unit)) {
I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_FALSE);
}
/* The old texture is no longer bound to this texture unit.
* Mark it as such.
*/
if ( i915->intel.CurrentTexObj[unit] != NULL ) {
i915->intel.CurrentTexObj[unit]->base.bound &= ~(1U << 0);
i915->intel.CurrentTexObj[unit] = NULL;
}
return GL_TRUE;
}
void
i915UpdateTextureState(struct intel_context *intel)
{
GLboolean ok = GL_TRUE;
GLuint i;
for (i = 0; i < I915_TEX_UNITS && ok; i++) {
switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
case TEXTURE_1D_BIT:
case TEXTURE_2D_BIT:
case TEXTURE_CUBE_BIT:
case TEXTURE_3D_BIT:
ok = i915_update_tex_unit(intel, i, SS3_NORMALIZED_COORDS);
break;
case TEXTURE_RECT_BIT:
ok = i915_update_tex_unit(intel, i, 0);
break;
case 0:{
struct i915_context *i915 = i915_context(&intel->ctx);
if (i915->state.active & I915_UPLOAD_TEX(i))
I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(i), GL_FALSE);
if (i915->state.tex_buffer[i] != NULL) {
drm_intel_bo_unreference(i915->state.tex_buffer[i]);
i915->state.tex_buffer[i] = NULL;
}
break;
}
default:
ok = GL_FALSE;
break;
}
}
FALLBACK(intel, I915_FALLBACK_TEXTURE, !ok);
}
/* Recalculate all state from scratch. Perhaps not the most
* efficient, but this has gotten complex enough that we need
* something which is understandable and reliable.
*/
static GLboolean
i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
{
struct gl_context *ctx = &intel->ctx;
struct i915_context *i915 = i915_context(ctx);
struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *tObj = tUnit->_Current;
struct intel_texture_object *intelObj = intel_texture_object(tObj);
struct gl_texture_image *firstImage;
GLuint *state = i915->state.Tex[unit], format, pitch;
GLint lodbias, aniso = 0;
GLubyte border[4];
GLfloat maxlod;
memset(state, 0, sizeof(state));
/*We need to refcount these. */
if (i915->state.tex_buffer[unit] != NULL) {
drm_intel_bo_unreference(i915->state.tex_buffer[unit]);
i915->state.tex_buffer[unit] = NULL;
}
if (!intel_finalize_mipmap_tree(intel, unit))
return GL_FALSE;
/* Get first image here, since intelObj->firstLevel will get set in
* the intel_finalize_mipmap_tree() call above.
*/
firstImage = tObj->Image[0][intelObj->firstLevel];
drm_intel_bo_reference(intelObj->mt->region->buffer);
i915->state.tex_buffer[unit] = intelObj->mt->region->buffer;
i915->state.tex_offset[unit] = 0; /* Always the origin of the miptree */
format = translate_texture_format(firstImage->TexFormat,
firstImage->InternalFormat,
tObj->DepthMode);
pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
state[I915_TEXREG_MS3] =
(((firstImage->Height - 1) << MS3_HEIGHT_SHIFT) |
((firstImage->Width - 1) << MS3_WIDTH_SHIFT) | format);
if (intelObj->mt->region->tiling != I915_TILING_NONE) {
state[I915_TEXREG_MS3] |= MS3_TILED_SURFACE;
if (intelObj->mt->region->tiling == I915_TILING_Y)
state[I915_TEXREG_MS3] |= MS3_TILE_WALK;
}
/* We get one field with fraction bits for the maximum addressable
* (lowest resolution) LOD. Use it to cover both MAX_LEVEL and
* MAX_LOD.
*/
maxlod = MIN2(tObj->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
state[I915_TEXREG_MS4] =
((((pitch / 4) - 1) << MS4_PITCH_SHIFT) |
MS4_CUBE_FACE_ENA_MASK |
(U_FIXED(CLAMP(maxlod, 0.0, 11.0), 2) << MS4_MAX_LOD_SHIFT) |
((firstImage->Depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
{
GLuint minFilt, mipFilt, magFilt;
switch (tObj->MinFilter) {
case GL_NEAREST:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_NONE;
break;
case GL_LINEAR:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_NONE;
break;
case GL_NEAREST_MIPMAP_NEAREST:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_NEAREST;
break;
case GL_LINEAR_MIPMAP_NEAREST:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_NEAREST;
break;
case GL_NEAREST_MIPMAP_LINEAR:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_LINEAR;
break;
case GL_LINEAR_MIPMAP_LINEAR:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_LINEAR;
break;
default:
return GL_FALSE;
}
if (tObj->MaxAnisotropy > 1.0) {
minFilt = FILTER_ANISOTROPIC;
magFilt = FILTER_ANISOTROPIC;
if (tObj->MaxAnisotropy > 2.0)
aniso = SS2_MAX_ANISO_4;
else
aniso = SS2_MAX_ANISO_2;
}
else {
switch (tObj->MagFilter) {
case GL_NEAREST:
magFilt = FILTER_NEAREST;
break;
case GL_LINEAR:
magFilt = FILTER_LINEAR;
break;
default:
return GL_FALSE;
}
}
lodbias = (int) ((tUnit->LodBias + tObj->LodBias) * 16.0);
if (lodbias < -256)
lodbias = -256;
if (lodbias > 255)
lodbias = 255;
state[I915_TEXREG_SS2] = ((lodbias << SS2_LOD_BIAS_SHIFT) &
SS2_LOD_BIAS_MASK);
/* YUV conversion:
*/
if (firstImage->TexFormat == MESA_FORMAT_YCBCR ||
firstImage->TexFormat == MESA_FORMAT_YCBCR_REV)
state[I915_TEXREG_SS2] |= SS2_COLORSPACE_CONVERSION;
/* Shadow:
*/
if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB &&
tObj->Target != GL_TEXTURE_3D) {
if (tObj->Target == GL_TEXTURE_1D)
return GL_FALSE;
state[I915_TEXREG_SS2] |=
(SS2_SHADOW_ENABLE |
intel_translate_shadow_compare_func(tObj->CompareFunc));
minFilt = FILTER_4X4_FLAT;
magFilt = FILTER_4X4_FLAT;
}
state[I915_TEXREG_SS2] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
(mipFilt << SS2_MIP_FILTER_SHIFT) |
(magFilt << SS2_MAG_FILTER_SHIFT) |
aniso);
}
{
GLenum ws = tObj->WrapS;
GLenum wt = tObj->WrapT;
GLenum wr = tObj->WrapR;
float minlod;
/* We program 1D textures as 2D textures, so the 2D texcoord could
* result in sampling border values if we don't set the T wrap to
* repeat.
*/
if (tObj->Target == GL_TEXTURE_1D)
wt = GL_REPEAT;
/* 3D textures don't seem to respect the border color.
* Fallback if there's ever a danger that they might refer to
* it.
*
* Effectively this means fallback on 3D clamp or
* clamp_to_border.
*/
if (tObj->Target == GL_TEXTURE_3D &&
(tObj->MinFilter != GL_NEAREST ||
tObj->MagFilter != GL_NEAREST) &&
(ws == GL_CLAMP ||
wt == GL_CLAMP ||
wr == GL_CLAMP ||
ws == GL_CLAMP_TO_BORDER ||
wt == GL_CLAMP_TO_BORDER || wr == GL_CLAMP_TO_BORDER))
return GL_FALSE;
/* Only support TEXCOORDMODE_CLAMP_EDGE and TEXCOORDMODE_CUBE (not
* used) when using cube map texture coordinates
*/
if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
(((ws != GL_CLAMP) && (ws != GL_CLAMP_TO_EDGE)) ||
((wt != GL_CLAMP) && (wt != GL_CLAMP_TO_EDGE))))
return GL_FALSE;
state[I915_TEXREG_SS3] = ss3; /* SS3_NORMALIZED_COORDS */
state[I915_TEXREG_SS3] |=
((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
(translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
(translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
minlod = MIN2(tObj->MinLod, tObj->_MaxLevel - tObj->BaseLevel);
state[I915_TEXREG_SS3] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
state[I915_TEXREG_SS3] |= (U_FIXED(CLAMP(minlod, 0.0, 11.0), 4) <<
SS3_MIN_LOD_SHIFT);
}
/* convert border color from float to ubyte */
CLAMPED_FLOAT_TO_UBYTE(border[0], tObj->BorderColor.f[0]);
CLAMPED_FLOAT_TO_UBYTE(border[1], tObj->BorderColor.f[1]);
CLAMPED_FLOAT_TO_UBYTE(border[2], tObj->BorderColor.f[2]);
CLAMPED_FLOAT_TO_UBYTE(border[3], tObj->BorderColor.f[3]);
if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
/* GL specs that border color for depth textures is taken from the
* R channel, while the hardware uses A. Spam R into all the channels
* for safety.
*/
state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[0],
border[0],
border[0],
border[0]);
} else {
state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[3],
border[0],
border[1],
border[2]);
}
I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);
/* memcmp was already disabled, but definitely won't work as the
* region might now change and that wouldn't be detected:
*/
I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
#if 0
DBG(TEXTURE, "state[I915_TEXREG_SS2] = 0x%x\n", state[I915_TEXREG_SS2]);
DBG(TEXTURE, "state[I915_TEXREG_SS3] = 0x%x\n", state[I915_TEXREG_SS3]);
DBG(TEXTURE, "state[I915_TEXREG_SS4] = 0x%x\n", state[I915_TEXREG_SS4]);
DBG(TEXTURE, "state[I915_TEXREG_MS2] = 0x%x\n", state[I915_TEXREG_MS2]);
DBG(TEXTURE, "state[I915_TEXREG_MS3] = 0x%x\n", state[I915_TEXREG_MS3]);
DBG(TEXTURE, "state[I915_TEXREG_MS4] = 0x%x\n", state[I915_TEXREG_MS4]);
#endif
return GL_TRUE;
}
/* =============================================================
* Fog
*/
void
i915_update_fog(GLcontext * ctx)
{
struct i915_context *i915 = I915_CONTEXT(ctx);
GLenum mode;
GLboolean enabled;
GLboolean try_pixel_fog;
if (ctx->FragmentProgram._Active) {
/* Pull in static fog state from program */
mode = ctx->FragmentProgram._Current->FogOption;
enabled = (mode != GL_NONE);
try_pixel_fog = 0;
}
else {
enabled = ctx->Fog.Enabled;
mode = ctx->Fog.Mode;
#if 0
/* XXX - DISABLED -- Need ortho fallback */
try_pixel_fog = (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT
&& ctx->Hint.Fog == GL_NICEST);
#else
try_pixel_fog = 0;
#endif
}
if (!enabled) {
i915->vertex_fog = I915_FOG_NONE;
}
else if (try_pixel_fog) {
I915_STATECHANGE(i915, I915_UPLOAD_FOG);
i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
i915->vertex_fog = I915_FOG_PIXEL;
switch (mode) {
case GL_LINEAR:
if (ctx->Fog.End <= ctx->Fog.Start) {
/* XXX - this won't work with fragment programs. Need to
* either fallback or append fog instructions to end of
* program in the case of linear fog.
*/
printf("vertex fog!\n");
i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
i915->vertex_fog = I915_FOG_VERTEX;
}
else {
GLfloat c2 = 1.0 / (ctx->Fog.End - ctx->Fog.Start);
GLfloat c1 = ctx->Fog.End * c2;
i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_C1_MASK;
i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_LINEAR;
i915->state.Fog[I915_FOGREG_MODE1] |=
((GLuint) (c1 * FMC1_C1_ONE)) & FMC1_C1_MASK;
if (i915->state.Fog[I915_FOGREG_MODE1] & FMC1_FOGINDEX_Z) {
i915->state.Fog[I915_FOGREG_MODE2]
= (GLuint) (c2 * FMC2_C2_ONE);
}
else {
fi_type fi;
fi.f = c2;
i915->state.Fog[I915_FOGREG_MODE2] = fi.i;
}
}
break;
case GL_EXP:
i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP;
break;
case GL_EXP2:
i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP2;
break;
default:
break;
}
}
else { /* if (i915->vertex_fog != I915_FOG_VERTEX) */
I915_STATECHANGE(i915, I915_UPLOAD_FOG);
i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
i915->vertex_fog = I915_FOG_VERTEX;
}
I915_STATECHANGE(i915, I915_UPLOAD_CTX);
I915_ACTIVESTATE(i915, I915_UPLOAD_FOG, enabled);
if (enabled)
i915->state.Ctx[I915_CTXREG_LIS5] |= S5_FOG_ENABLE;
else
i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_FOG_ENABLE;
/* Always enable pixel fog. Vertex fog using fog coord will conflict
* with fog code appended onto fragment program.
*/
_tnl_allow_vertex_fog( ctx, 0 );
_tnl_allow_pixel_fog( ctx, 1 );
}
/* Recalculate all state from scratch. Perhaps not the most
* efficient, but this has gotten complex enough that we need
* something which is understandable and reliable.
*/
static bool
i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
{
struct gl_context *ctx = &intel->ctx;
struct i915_context *i915 = i915_context(ctx);
struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *tObj = tUnit->_Current;
struct intel_texture_object *intelObj = intel_texture_object(tObj);
struct gl_texture_image *firstImage;
struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
GLuint *state = i915->state.Tex[unit], format, pitch;
GLint lodbias, aniso = 0;
GLubyte border[4];
GLfloat maxlod;
memset(state, 0, sizeof(state));
/*We need to refcount these. */
if (i915->state.tex_buffer[unit] != NULL) {
drm_intel_bo_unreference(i915->state.tex_buffer[unit]);
i915->state.tex_buffer[unit] = NULL;
}
if (!intel_finalize_mipmap_tree(intel, unit))
return false;
/* Get first image here, since intelObj->firstLevel will get set in
* the intel_finalize_mipmap_tree() call above.
*/
firstImage = tObj->Image[0][tObj->BaseLevel];
drm_intel_bo_reference(intelObj->mt->region->bo);
i915->state.tex_buffer[unit] = intelObj->mt->region->bo;
i915->state.tex_offset[unit] = intelObj->mt->offset;
format = translate_texture_format(firstImage->TexFormat,
tObj->DepthMode);
pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
state[I915_TEXREG_MS3] =
(((firstImage->Height - 1) << MS3_HEIGHT_SHIFT) |
((firstImage->Width - 1) << MS3_WIDTH_SHIFT) | format);
if (intelObj->mt->region->tiling != I915_TILING_NONE) {
state[I915_TEXREG_MS3] |= MS3_TILED_SURFACE;
if (intelObj->mt->region->tiling == I915_TILING_Y)
state[I915_TEXREG_MS3] |= MS3_TILE_WALK;
}
/* We get one field with fraction bits for the maximum addressable
* (lowest resolution) LOD. Use it to cover both MAX_LEVEL and
* MAX_LOD.
*/
maxlod = MIN2(sampler->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
state[I915_TEXREG_MS4] =
((((pitch / 4) - 1) << MS4_PITCH_SHIFT) |
MS4_CUBE_FACE_ENA_MASK |
(U_FIXED(CLAMP(maxlod, 0.0, 11.0), 2) << MS4_MAX_LOD_SHIFT) |
((firstImage->Depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
{
GLuint minFilt, mipFilt, magFilt;
switch (sampler->MinFilter) {
case GL_NEAREST:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_NONE;
break;
case GL_LINEAR:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_NONE;
break;
case GL_NEAREST_MIPMAP_NEAREST:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_NEAREST;
break;
case GL_LINEAR_MIPMAP_NEAREST:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_NEAREST;
break;
case GL_NEAREST_MIPMAP_LINEAR:
minFilt = FILTER_NEAREST;
mipFilt = MIPFILTER_LINEAR;
break;
case GL_LINEAR_MIPMAP_LINEAR:
minFilt = FILTER_LINEAR;
mipFilt = MIPFILTER_LINEAR;
break;
default:
return false;
}
if (sampler->MaxAnisotropy > 1.0) {
minFilt = FILTER_ANISOTROPIC;
magFilt = FILTER_ANISOTROPIC;
if (sampler->MaxAnisotropy > 2.0)
aniso = SS2_MAX_ANISO_4;
else
aniso = SS2_MAX_ANISO_2;
}
else {
switch (sampler->MagFilter) {
case GL_NEAREST:
magFilt = FILTER_NEAREST;
break;
case GL_LINEAR:
magFilt = FILTER_LINEAR;
break;
default:
return false;
}
}
lodbias = (int) ((tUnit->LodBias + sampler->LodBias) * 16.0);
if (lodbias < -256)
lodbias = -256;
if (lodbias > 255)
lodbias = 255;
state[I915_TEXREG_SS2] = ((lodbias << SS2_LOD_BIAS_SHIFT) &
SS2_LOD_BIAS_MASK);
/* YUV conversion:
*/
if (firstImage->TexFormat == MESA_FORMAT_YCBCR ||
firstImage->TexFormat == MESA_FORMAT_YCBCR_REV)
state[I915_TEXREG_SS2] |= SS2_COLORSPACE_CONVERSION;
/* Shadow:
*/
if (sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB &&
tObj->Target != GL_TEXTURE_3D) {
if (tObj->Target == GL_TEXTURE_1D)
return false;
state[I915_TEXREG_SS2] |=
(SS2_SHADOW_ENABLE |
intel_translate_shadow_compare_func(sampler->CompareFunc));
minFilt = FILTER_4X4_FLAT;
magFilt = FILTER_4X4_FLAT;
}
state[I915_TEXREG_SS2] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
(mipFilt << SS2_MIP_FILTER_SHIFT) |
(magFilt << SS2_MAG_FILTER_SHIFT) |
aniso);
}
{
GLenum ws = sampler->WrapS;
GLenum wt = sampler->WrapT;
GLenum wr = sampler->WrapR;
float minlod;
/* We program 1D textures as 2D textures, so the 2D texcoord could
* result in sampling border values if we don't set the T wrap to
* repeat.
*/
if (tObj->Target == GL_TEXTURE_1D)
wt = GL_REPEAT;
/* 3D textures don't seem to respect the border color.
* Fallback if there's ever a danger that they might refer to
* it.
*
* Effectively this means fallback on 3D clamp or
* clamp_to_border.
*/
if (tObj->Target == GL_TEXTURE_3D &&
(sampler->MinFilter != GL_NEAREST ||
sampler->MagFilter != GL_NEAREST) &&
(ws == GL_CLAMP ||
wt == GL_CLAMP ||
wr == GL_CLAMP ||
ws == GL_CLAMP_TO_BORDER ||
wt == GL_CLAMP_TO_BORDER || wr == GL_CLAMP_TO_BORDER))
return false;
/* Only support TEXCOORDMODE_CLAMP_EDGE and TEXCOORDMODE_CUBE (not
* used) when using cube map texture coordinates
*/
if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
(((ws != GL_CLAMP) && (ws != GL_CLAMP_TO_EDGE)) ||
((wt != GL_CLAMP) && (wt != GL_CLAMP_TO_EDGE))))
return false;
/*
* According to 3DSTATE_MAP_STATE at page of 104 in Bspec
* Vol3d 3D Instructions:
* [DevGDG and DevAlv]: Must be a power of 2 for cube maps.
* [DevLPT, DevCST and DevBLB]: If not a power of 2, cube maps
* must have all faces enabled.
*
* But, as I tested on pineview(DevBLB derived), the rendering is
* bad(you will find the color isn't samplered right in some
* fragments). After checking, it seems that the texture layout is
* wrong: making the width and height align of 4(although this
* doesn't make much sense) will fix this issue and also broke some
* others. Well, Bspec mentioned nothing about the layout alignment
* and layout for NPOT cube map. I guess the Bspec just assume it's
* a POT cube map.
*
* Thus, I guess we need do this for other platforms as well.
*/
if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
!is_power_of_two(firstImage->Height))
return false;
state[I915_TEXREG_SS3] = ss3; /* SS3_NORMALIZED_COORDS */
state[I915_TEXREG_SS3] |=
((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
(translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
(translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
minlod = MIN2(sampler->MinLod, tObj->_MaxLevel - tObj->BaseLevel);
state[I915_TEXREG_SS3] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
state[I915_TEXREG_SS3] |= (U_FIXED(CLAMP(minlod, 0.0, 11.0), 4) <<
SS3_MIN_LOD_SHIFT);
}
/* convert border color from float to ubyte */
CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->BorderColor.f[2]);
CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->BorderColor.f[3]);
if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
/* GL specs that border color for depth textures is taken from the
* R channel, while the hardware uses A. Spam R into all the channels
* for safety.
*/
state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[0],
border[0],
border[0],
border[0]);
} else {
state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[3],
border[0],
border[1],
border[2]);
}
I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), true);
/* memcmp was already disabled, but definitely won't work as the
* region might now change and that wouldn't be detected:
*/
I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
#if 0
DBG(TEXTURE, "state[I915_TEXREG_SS2] = 0x%x\n", state[I915_TEXREG_SS2]);
DBG(TEXTURE, "state[I915_TEXREG_SS3] = 0x%x\n", state[I915_TEXREG_SS3]);
DBG(TEXTURE, "state[I915_TEXREG_SS4] = 0x%x\n", state[I915_TEXREG_SS4]);
DBG(TEXTURE, "state[I915_TEXREG_MS2] = 0x%x\n", state[I915_TEXREG_MS2]);
DBG(TEXTURE, "state[I915_TEXREG_MS3] = 0x%x\n", state[I915_TEXREG_MS3]);
DBG(TEXTURE, "state[I915_TEXREG_MS4] = 0x%x\n", state[I915_TEXREG_MS4]);
#endif
return true;
}