/************************************************************************** * * 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 * 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); if (stObj->pt->target == PIPE_BUFFER) { unsigned base, size; unsigned f, n; const struct util_format_description *desc = util_format_description(templ.format); base = stObj->base.BufferOffset; if (base >= stObj->pt->width0) return NULL; size = MIN2(stObj->pt->width0 - base, (unsigned)stObj->base.BufferSize); f = ((base * 8) / desc->block.bits) * desc->block.width; n = ((size * 8) / desc->block.bits) * desc->block.width; if (!n) return NULL; templ.u.buf.first_element = f; templ.u.buf.last_element = f + (n - 1); } else { 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 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 */ if (texObj->Target == GL_TEXTURE_BUFFER) { view_format = st_mesa_format_to_pipe_format(stObj->base._BufferObjectFormat); } else { view_format = stObj->surface_based ? stObj->surface_format : stObj->pt->format; /* If sRGB decoding is off, use the linear format */ if (samp->sRGBDecode == GL_SKIP_DECODE_EXT) { view_format = util_format_linear(view_format); } } /* if sampler view has changed dereference it */ if (stObj->sampler_view) { if (check_sampler_swizzle(stObj->sampler_view, stObj->base._Swizzle, stObj->base.DepthMode) || (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, 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.VertexProgram.MaxTextureImageUnits > 0) { update_textures(st, PIPE_SHADER_VERTEX, &ctx->VertexProgram._Current->Base, ctx->Const.VertexProgram.MaxTextureImageUnits, 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.FragmentProgram.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.FragmentProgram.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 */ };