| /************************************************************************** |
| * |
| * 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 "main/mtypes.h" |
| #include "main/samplerobj.h" |
| #include "main/texobj.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 struct pipe_sampler_view * |
| st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe, |
| struct st_texture_object *stObj, |
| const struct gl_sampler_object *samp, |
| 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); |
| templ.u.tex.first_level = stObj->base.BaseLevel; |
| |
| 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 struct pipe_sampler_view * |
| st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj, |
| struct pipe_context *pipe, |
| const struct gl_sampler_object *samp, |
| 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, samp, format); |
| } |
| |
| return stObj->sampler_view; |
| } |
| |
| |
| static GLboolean |
| update_single_texture(struct st_context *st, |
| struct pipe_sampler_view **sampler_view, |
| GLuint texUnit) |
| { |
| struct pipe_context *pipe = st->pipe; |
| struct gl_context *ctx = st->ctx; |
| const struct gl_sampler_object *samp; |
| struct gl_texture_object *texObj; |
| struct st_texture_object *stObj; |
| enum pipe_format st_view_format; |
| GLboolean retval; |
| |
| samp = _mesa_get_samplerobj(ctx, texUnit); |
| |
| texObj = ctx->Texture.Unit[texUnit]._Current; |
| |
| if (!texObj) { |
| texObj = _mesa_get_fallback_texture(ctx, TEXTURE_2D_INDEX); |
| samp = &texObj->Sampler; |
| } |
| stObj = st_texture_object(texObj); |
| |
| retval = st_finalize_texture(ctx, st->pipe, texObj); |
| if (!retval) { |
| /* out of mem */ |
| return GL_FALSE; |
| } |
| |
| /* Determine the format of the texture sampler view */ |
| st_view_format = stObj->pt->format; |
| { |
| const struct st_texture_image *firstImage = |
| st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]); |
| const gl_format texFormat = firstImage->base.TexFormat; |
| enum pipe_format firstImageFormat = |
| st_mesa_format_to_pipe_format(texFormat); |
| |
| if ((samp->sRGBDecode == GL_SKIP_DECODE_EXT) && |
| (_mesa_get_format_color_encoding(texFormat) == GL_SRGB)) { |
| /* Don't do sRGB->RGB conversion. Interpret the texture data as |
| * linear values. |
| */ |
| const gl_format linearFormat = |
| _mesa_get_srgb_format_linear(texFormat); |
| firstImageFormat = st_mesa_format_to_pipe_format(linearFormat); |
| } |
| |
| if (firstImageFormat != stObj->pt->format) |
| st_view_format = firstImageFormat; |
| } |
| |
| /* 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) || |
| stObj->base.BaseLevel != stObj->sampler_view->u.tex.first_level) { |
| pipe_sampler_view_reference(&stObj->sampler_view, NULL); |
| } |
| } |
| |
| *sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe, |
| samp, |
| st_view_format); |
| return GL_TRUE; |
| } |
| |
| |
| |
| static void |
| update_textures(struct st_context *st, |
| unsigned shader_stage, |
| const struct gl_program *prog, |
| unsigned max_units, |
| struct pipe_sampler_view **sampler_views, |
| unsigned *num_textures) |
| { |
| const GLuint old_max = *num_textures; |
| GLbitfield samplers_used = prog->SamplersUsed; |
| GLuint unit, new_count; |
| |
| if (samplers_used == 0x0 && old_max == 0) |
| return; |
| |
| *num_textures = 0; |
| |
| /* loop over sampler units (aka tex image units) */ |
| for (unit = 0; unit < max_units; unit++, samplers_used >>= 1) { |
| struct pipe_sampler_view *sampler_view = NULL; |
| |
| if (samplers_used & 1) { |
| const GLuint texUnit = prog->SamplerUnits[unit]; |
| GLboolean retval; |
| |
| retval = update_single_texture(st, &sampler_view, texUnit); |
| if (retval == GL_FALSE) |
| continue; |
| |
| *num_textures = unit + 1; |
| } |
| else if (samplers_used == 0 && unit >= old_max) { |
| /* if we've reset all the old views and we have no more new ones */ |
| break; |
| } |
| |
| pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view); |
| } |
| |
| /* Ex: if old_max = 3 and *num_textures = 1, we need to pass an |
| * array of views={X, NULL, NULL} to unref the old texture views |
| * at positions [1] and [2]. |
| */ |
| new_count = MAX2(*num_textures, old_max); |
| assert(new_count <= max_units); |
| |
| cso_set_sampler_views(st->cso_context, |
| shader_stage, |
| new_count, |
| sampler_views); |
| } |
| |
| |
| |
| static void |
| update_vertex_textures(struct st_context *st) |
| { |
| const struct gl_context *ctx = st->ctx; |
| |
| if (ctx->Const.MaxVertexTextureImageUnits > 0) { |
| update_textures(st, |
| PIPE_SHADER_VERTEX, |
| &ctx->VertexProgram._Current->Base, |
| ctx->Const.MaxVertexTextureImageUnits, |
| st->state.sampler_views[PIPE_SHADER_VERTEX], |
| &st->state.num_sampler_views[PIPE_SHADER_VERTEX]); |
| } |
| } |
| |
| |
| static void |
| update_fragment_textures(struct st_context *st) |
| { |
| const struct gl_context *ctx = st->ctx; |
| |
| update_textures(st, |
| PIPE_SHADER_FRAGMENT, |
| &ctx->FragmentProgram._Current->Base, |
| ctx->Const.MaxTextureImageUnits, |
| st->state.sampler_views[PIPE_SHADER_FRAGMENT], |
| &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]); |
| } |
| |
| |
| static void |
| update_geometry_textures(struct st_context *st) |
| { |
| const struct gl_context *ctx = st->ctx; |
| |
| if (ctx->GeometryProgram._Current) { |
| update_textures(st, |
| PIPE_SHADER_GEOMETRY, |
| &ctx->GeometryProgram._Current->Base, |
| ctx->Const.MaxTextureImageUnits, |
| st->state.sampler_views[PIPE_SHADER_GEOMETRY], |
| &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]); |
| } |
| } |
| |
| |
| const struct st_tracked_state st_update_fragment_texture = { |
| "st_update_texture", /* name */ |
| { /* dirty */ |
| _NEW_TEXTURE, /* mesa */ |
| ST_NEW_FRAGMENT_PROGRAM, /* st */ |
| }, |
| update_fragment_textures /* update */ |
| }; |
| |
| |
| const struct st_tracked_state st_update_vertex_texture = { |
| "st_update_vertex_texture", /* name */ |
| { /* dirty */ |
| _NEW_TEXTURE, /* mesa */ |
| ST_NEW_VERTEX_PROGRAM, /* st */ |
| }, |
| update_vertex_textures /* update */ |
| }; |
| |
| |
| const struct st_tracked_state st_update_geometry_texture = { |
| "st_update_geometry_texture", /* name */ |
| { /* dirty */ |
| _NEW_TEXTURE, /* mesa */ |
| ST_NEW_GEOMETRY_PROGRAM, /* st */ |
| }, |
| update_geometry_textures /* update */ |
| }; |
| |
| |
| |
| static void |
| finalize_textures(struct st_context *st) |
| { |
| struct gl_context *ctx = st->ctx; |
| struct gl_fragment_program *fprog = ctx->FragmentProgram._Current; |
| const GLboolean prev_missing_textures = st->missing_textures; |
| GLuint su; |
| |
| st->missing_textures = GL_FALSE; |
| |
| for (su = 0; su < ctx->Const.MaxTextureCoordUnits; su++) { |
| if (fprog->Base.SamplersUsed & (1 << su)) { |
| const GLuint texUnit = fprog->Base.SamplerUnits[su]; |
| struct gl_texture_object *texObj |
| = ctx->Texture.Unit[texUnit]._Current; |
| |
| if (texObj) { |
| GLboolean retval; |
| |
| retval = st_finalize_texture(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; |
| } |
| |
| |
| const struct st_tracked_state st_finalize_textures = { |
| "st_finalize_textures", /* name */ |
| { /* dirty */ |
| _NEW_TEXTURE, /* mesa */ |
| 0, /* st */ |
| }, |
| finalize_textures /* update */ |
| }; |
