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/************************************************************************** |
* |
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
* All Rights Reserved. |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the |
* "Software"), to deal in the Software without restriction, including |
* without limitation the rights to use, copy, modify, merge, publish, |
* distribute, sub license, and/or sell copies of the Software, and to |
* permit persons to whom the Software is furnished to do so, subject to |
* the following conditions: |
* |
* The above copyright notice and this permission notice (including the |
* next paragraph) shall be included in all copies or substantial portions |
* of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
* |
**************************************************************************/ |
|
/* |
* Authors: |
* Keith Whitwell <keith@tungstengraphics.com> |
* Brian Paul |
*/ |
|
|
#include "main/macros.h" |
#include "program/prog_instruction.h" |
|
#include "st_context.h" |
#include "st_atom.h" |
#include "st_texture.h" |
#include "st_format.h" |
#include "st_cb_texture.h" |
#include "pipe/p_context.h" |
#include "util/u_format.h" |
#include "util/u_inlines.h" |
#include "cso_cache/cso_context.h" |
|
/** |
* Combine depth texture mode with "swizzle" so that depth mode swizzling |
* takes place before texture swizzling, and return the resulting swizzle. |
* If the format is not a depth format, return "swizzle" unchanged. |
* |
* \param format PIPE_FORMAT_*. |
* \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4. |
* \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA, GL_RED. |
*/ |
static GLuint apply_depthmode(enum pipe_format format, |
GLuint swizzle, GLenum depthmode) |
{ |
const struct util_format_description *desc = |
util_format_description(format); |
unsigned char swiz[4]; |
unsigned i; |
|
if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS || |
desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_NONE) { |
/* Not a depth format. */ |
return swizzle; |
} |
|
for (i = 0; i < 4; i++) |
swiz[i] = GET_SWZ(swizzle, i); |
|
switch (depthmode) { |
case GL_LUMINANCE: |
/* Rewrite reads from W to ONE, and reads from XYZ to XXX. */ |
for (i = 0; i < 4; i++) |
if (swiz[i] == SWIZZLE_W) |
swiz[i] = SWIZZLE_ONE; |
else if (swiz[i] < SWIZZLE_W) |
swiz[i] = SWIZZLE_X; |
break; |
|
case GL_INTENSITY: |
/* Rewrite reads from XYZW to XXXX. */ |
for (i = 0; i < 4; i++) |
if (swiz[i] <= SWIZZLE_W) |
swiz[i] = SWIZZLE_X; |
break; |
|
case GL_ALPHA: |
/* Rewrite reads from W to X, and reads from XYZ to 000. */ |
for (i = 0; i < 4; i++) |
if (swiz[i] == SWIZZLE_W) |
swiz[i] = SWIZZLE_X; |
else if (swiz[i] < SWIZZLE_W) |
swiz[i] = SWIZZLE_ZERO; |
break; |
case GL_RED: |
/* Rewrite reads W to 1, XYZ to X00 */ |
for (i = 0; i < 4; i++) |
if (swiz[i] == SWIZZLE_W) |
swiz[i] = SWIZZLE_ONE; |
else if (swiz[i] == SWIZZLE_Y || swiz[i] == SWIZZLE_Z) |
swiz[i] = SWIZZLE_ZERO; |
break; |
} |
|
return MAKE_SWIZZLE4(swiz[0], swiz[1], swiz[2], swiz[3]); |
} |
|
/** |
* Return TRUE if the swizzling described by "swizzle" and |
* "depthmode" (for depth textures only) is different from the swizzling |
* set in the given sampler view. |
* |
* \param sv A sampler view. |
* \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4. |
* \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA. |
*/ |
static boolean check_sampler_swizzle(struct pipe_sampler_view *sv, |
GLuint swizzle, GLenum depthmode) |
{ |
swizzle = apply_depthmode(sv->texture->format, swizzle, depthmode); |
|
if ((sv->swizzle_r != GET_SWZ(swizzle, 0)) || |
(sv->swizzle_g != GET_SWZ(swizzle, 1)) || |
(sv->swizzle_b != GET_SWZ(swizzle, 2)) || |
(sv->swizzle_a != GET_SWZ(swizzle, 3))) |
return true; |
return false; |
} |
|
static INLINE struct pipe_sampler_view * |
st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe, |
struct st_texture_object *stObj, |
enum pipe_format format) |
|
{ |
struct pipe_sampler_view templ; |
GLuint swizzle = apply_depthmode(stObj->pt->format, |
stObj->base._Swizzle, |
stObj->base.DepthMode); |
|
u_sampler_view_default_template(&templ, |
stObj->pt, |
format); |
|
if (swizzle != SWIZZLE_NOOP) { |
templ.swizzle_r = GET_SWZ(swizzle, 0); |
templ.swizzle_g = GET_SWZ(swizzle, 1); |
templ.swizzle_b = GET_SWZ(swizzle, 2); |
templ.swizzle_a = GET_SWZ(swizzle, 3); |
} |
|
return pipe->create_sampler_view(pipe, stObj->pt, &templ); |
} |
|
|
static INLINE struct pipe_sampler_view * |
st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj, |
struct pipe_context *pipe, |
enum pipe_format format) |
|
{ |
if (!stObj || !stObj->pt) { |
return NULL; |
} |
|
if (!stObj->sampler_view) { |
stObj->sampler_view = st_create_texture_sampler_view_from_stobj(pipe, stObj, format); |
} |
|
return stObj->sampler_view; |
} |
|
static void |
update_textures(struct st_context *st) |
{ |
struct pipe_context *pipe = st->pipe; |
struct gl_vertex_program *vprog = st->ctx->VertexProgram._Current; |
struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current; |
const GLbitfield samplersUsed = (vprog->Base.SamplersUsed | |
fprog->Base.SamplersUsed); |
GLuint su; |
|
st->state.num_textures = 0; |
|
/* loop over sampler units (aka tex image units) */ |
for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) { |
struct pipe_sampler_view *sampler_view = NULL; |
enum pipe_format st_view_format; |
if (samplersUsed & (1 << su)) { |
struct gl_texture_object *texObj; |
struct st_texture_object *stObj; |
GLboolean retval; |
GLuint texUnit; |
|
if (fprog->Base.SamplersUsed & (1 << su)) |
texUnit = fprog->Base.SamplerUnits[su]; |
else |
texUnit = vprog->Base.SamplerUnits[su]; |
|
texObj = st->ctx->Texture.Unit[texUnit]._Current; |
|
if (!texObj) { |
texObj = st_get_default_texture(st); |
} |
stObj = st_texture_object(texObj); |
|
retval = st_finalize_texture(st->ctx, st->pipe, texObj); |
if (!retval) { |
/* out of mem */ |
continue; |
} |
|
st_view_format = stObj->pt->format; |
{ |
struct st_texture_image *firstImage; |
enum pipe_format firstImageFormat; |
firstImage = st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]); |
|
firstImageFormat = st_mesa_format_to_pipe_format(firstImage->base.TexFormat); |
if (firstImageFormat != stObj->pt->format) |
st_view_format = firstImageFormat; |
|
} |
st->state.num_textures = su + 1; |
|
/* if sampler view has changed dereference it */ |
if (stObj->sampler_view) |
if (check_sampler_swizzle(stObj->sampler_view, |
stObj->base._Swizzle, |
stObj->base.DepthMode) || |
(st_view_format != stObj->sampler_view->format)) |
pipe_sampler_view_reference(&stObj->sampler_view, NULL); |
|
sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe, st_view_format); |
} |
pipe_sampler_view_reference(&st->state.sampler_views[su], sampler_view); |
} |
|
cso_set_fragment_sampler_views(st->cso_context, |
st->state.num_textures, |
st->state.sampler_views); |
if (st->ctx->Const.MaxVertexTextureImageUnits > 0) { |
cso_set_vertex_sampler_views(st->cso_context, |
MIN2(st->state.num_textures, |
st->ctx->Const.MaxVertexTextureImageUnits), |
st->state.sampler_views); |
} |
} |
|
|
const struct st_tracked_state st_update_texture = { |
"st_update_texture", /* name */ |
{ /* dirty */ |
_NEW_TEXTURE, /* mesa */ |
ST_NEW_FRAGMENT_PROGRAM, /* st */ |
}, |
update_textures /* update */ |
}; |
|
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|
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static void |
finalize_textures(struct st_context *st) |
{ |
struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current; |
const GLboolean prev_missing_textures = st->missing_textures; |
GLuint su; |
|
st->missing_textures = GL_FALSE; |
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for (su = 0; su < st->ctx->Const.MaxTextureCoordUnits; su++) { |
if (fprog->Base.SamplersUsed & (1 << su)) { |
const GLuint texUnit = fprog->Base.SamplerUnits[su]; |
struct gl_texture_object *texObj |
= st->ctx->Texture.Unit[texUnit]._Current; |
|
if (texObj) { |
GLboolean retval; |
|
retval = st_finalize_texture(st->ctx, st->pipe, texObj); |
if (!retval) { |
/* out of mem */ |
st->missing_textures = GL_TRUE; |
continue; |
} |
} |
} |
} |
|
if (prev_missing_textures != st->missing_textures) |
st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM; |
} |
|
|
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const struct st_tracked_state st_finalize_textures = { |
"st_finalize_textures", /* name */ |
{ /* dirty */ |
_NEW_TEXTURE, /* mesa */ |
0, /* st */ |
}, |
finalize_textures /* update */ |
}; |