diff options
Diffstat (limited to 'src/gallium/drivers/svga/svga_state_fs.c')
-rw-r--r-- | src/gallium/drivers/svga/svga_state_fs.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_state_fs.c b/src/gallium/drivers/svga/svga_state_fs.c new file mode 100644 index 0000000..bba80a9 --- /dev/null +++ b/src/gallium/drivers/svga/svga_state_fs.c @@ -0,0 +1,302 @@ +/********************************************************** + * Copyright 2008-2009 VMware, Inc. 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, sublicense, 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 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 + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * 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. + * + **********************************************************/ + +#include "pipe/p_inlines.h" +#include "pipe/p_defines.h" +#include "util/u_math.h" +#include "util/u_bitmask.h" + +#include "svga_context.h" +#include "svga_state.h" +#include "svga_cmd.h" +#include "svga_tgsi.h" + +#include "svga_hw_reg.h" + + + +static INLINE int compare_fs_keys( const struct svga_fs_compile_key *a, + const struct svga_fs_compile_key *b ) +{ + unsigned keysize_a = svga_fs_key_size( a ); + unsigned keysize_b = svga_fs_key_size( b ); + + if (keysize_a != keysize_b) { + return (int)(keysize_a - keysize_b); + } + return memcmp( a, b, keysize_a ); +} + + +static struct svga_shader_result *search_fs_key( struct svga_fragment_shader *fs, + const struct svga_fs_compile_key *key ) +{ + struct svga_shader_result *result = fs->base.results; + + assert(key); + + for ( ; result; result = result->next) { + if (compare_fs_keys( key, &result->key.fkey ) == 0) + return result; + } + + return NULL; +} + + +static enum pipe_error compile_fs( struct svga_context *svga, + struct svga_fragment_shader *fs, + const struct svga_fs_compile_key *key, + struct svga_shader_result **out_result ) +{ + struct svga_shader_result *result; + enum pipe_error ret; + + result = svga_translate_fragment_program( fs, key ); + if (result == NULL) { + ret = PIPE_ERROR_OUT_OF_MEMORY; + goto fail; + } + + result->id = util_bitmask_add(svga->fs_bm); + if(result->id == UTIL_BITMASK_INVALID_INDEX) + goto fail; + + ret = SVGA3D_DefineShader(svga->swc, + result->id, + SVGA3D_SHADERTYPE_PS, + result->tokens, + result->nr_tokens * sizeof result->tokens[0]); + if (ret) + goto fail; + + *out_result = result; + result->next = fs->base.results; + fs->base.results = result; + return PIPE_OK; + +fail: + if (result) { + if (result->id != UTIL_BITMASK_INVALID_INDEX) + util_bitmask_clear( svga->fs_bm, result->id ); + svga_destroy_shader_result( result ); + } + return ret; +} + +/* The blend workaround for simulating logicop xor behaviour requires + * that the incoming fragment color be white. This change achieves + * that by hooking up a hard-wired fragment shader that just emits + * color 1,1,1,1 + * + * This is a slightly incomplete solution as it assumes that the + * actual bound shader has no other effects beyond generating a + * fragment color. In particular shaders containing TEXKIL and/or + * depth-write will not have the correct behaviour, nor will those + * expecting to use alphatest. + * + * These are avoidable issues, but they are not much worse than the + * unavoidable ones associated with this technique, so it's not clear + * how much effort should be expended trying to resolve them - the + * ultimate result will still not be correct in most cases. + * + * Shader below was generated with: + * SVGA_DEBUG=tgsi ./mesa/progs/fp/fp-tri white.txt + */ +static int emit_white_fs( struct svga_context *svga ) +{ + int ret = PIPE_ERROR; + + /* ps_3_0 + * def c0, 1.000000, 0.000000, 0.000000, 1.000000 + * mov oC0, c0.x + * end + */ + static const unsigned white_tokens[] = { + 0xffff0300, + 0x05000051, + 0xa00f0000, + 0x3f800000, + 0x00000000, + 0x00000000, + 0x3f800000, + 0x02000001, + 0x800f0800, + 0xa0000000, + 0x0000ffff, + }; + + assert(SVGA3D_INVALID_ID == UTIL_BITMASK_INVALID_INDEX); + svga->state.white_fs_id = util_bitmask_add(svga->fs_bm); + if(svga->state.white_fs_id == SVGA3D_INVALID_ID) + goto no_fs_id; + + ret = SVGA3D_DefineShader(svga->swc, + svga->state.white_fs_id, + SVGA3D_SHADERTYPE_PS, + white_tokens, + sizeof(white_tokens)); + if (ret) + goto no_definition; + + return 0; + +no_definition: + util_bitmask_clear(svga->fs_bm, svga->state.white_fs_id); + svga->state.white_fs_id = SVGA3D_INVALID_ID; +no_fs_id: + return ret; +} + + +/* SVGA_NEW_TEXTURE_BINDING + * SVGA_NEW_RAST + * SVGA_NEW_NEED_SWTNL + * SVGA_NEW_SAMPLER + */ +static int make_fs_key( const struct svga_context *svga, + struct svga_fs_compile_key *key ) +{ + int i; + int idx = 0; + + memset(key, 0, sizeof *key); + + /* Only need fragment shader fixup for twoside lighting if doing + * hwtnl. Otherwise the draw module does the whole job for us. + * + * SVGA_NEW_SWTNL + */ + if (!svga->state.sw.need_swtnl) { + /* SVGA_NEW_RAST + */ + key->light_twoside = svga->curr.rast->templ.light_twoside; + key->front_cw = (svga->curr.rast->templ.front_winding == + PIPE_WINDING_CW); + } + + + /* XXX: want to limit this to the textures that the shader actually + * refers to. + * + * SVGA_NEW_TEXTURE_BINDING | SVGA_NEW_SAMPLER + */ + for (i = 0; i < svga->curr.num_textures; i++) { + if (svga->curr.texture[i]) { + assert(svga->curr.sampler[i]); + key->tex[i].texture_target = svga->curr.texture[i]->target; + if (!svga->curr.sampler[i]->normalized_coords) { + key->tex[i].width_height_idx = idx++; + key->tex[i].unnormalized = TRUE; + ++key->num_unnormalized_coords; + } + } + } + key->num_textures = svga->curr.num_textures; + + idx = 0; + for (i = 0; i < svga->curr.num_samplers; ++i) { + if (svga->curr.sampler[i]) { + key->tex[i].compare_mode = svga->curr.sampler[i]->compare_mode; + key->tex[i].compare_func = svga->curr.sampler[i]->compare_func; + } + } + + return 0; +} + + + +static int emit_hw_fs( struct svga_context *svga, + unsigned dirty ) +{ + struct svga_shader_result *result = NULL; + unsigned id = SVGA3D_INVALID_ID; + int ret = 0; + + /* SVGA_NEW_BLEND + */ + if (svga->curr.blend->need_white_fragments) { + if (svga->state.white_fs_id == SVGA3D_INVALID_ID) { + ret = emit_white_fs( svga ); + if (ret) + return ret; + } + id = svga->state.white_fs_id; + } + else { + struct svga_fragment_shader *fs = svga->curr.fs; + struct svga_fs_compile_key key; + + /* SVGA_NEW_TEXTURE_BINDING + * SVGA_NEW_RAST + * SVGA_NEW_NEED_SWTNL + * SVGA_NEW_SAMPLER + */ + ret = make_fs_key( svga, &key ); + if (ret) + return ret; + + result = search_fs_key( fs, &key ); + if (!result) { + ret = compile_fs( svga, fs, &key, &result ); + if (ret) + return ret; + } + + assert (result); + id = result->id; + } + + assert(id != SVGA3D_INVALID_ID); + + if (result != svga->state.hw_draw.fs) { + ret = SVGA3D_SetShader(svga->swc, + SVGA3D_SHADERTYPE_PS, + id ); + if (ret) + return ret; + + svga->dirty |= SVGA_NEW_FS_RESULT; + svga->state.hw_draw.fs = result; + } + + return 0; +} + +struct svga_tracked_state svga_hw_fs = +{ + "fragment shader (hwtnl)", + (SVGA_NEW_FS | + SVGA_NEW_TEXTURE_BINDING | + SVGA_NEW_NEED_SWTNL | + SVGA_NEW_RAST | + SVGA_NEW_SAMPLER | + SVGA_NEW_BLEND), + emit_hw_fs +}; + + + |