diff options
author | Alan Hourihane <alanh@tungstengraphics.com> | 2006-11-02 12:02:13 +0000 |
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committer | Alan Hourihane <alanh@tungstengraphics.com> | 2006-11-02 12:02:13 +0000 |
commit | 6d104cb932080c5c0d951fbc0ec6d30fb7ebef45 (patch) | |
tree | 17207f566d6eda4d3884ec03dfff6cdb5a1965ea /src/mesa/drivers/dri/i915tex/i830_texblend.c | |
parent | 18d52f96bb1f20b1887b67e87506835bca05d73a (diff) |
merge current trunk into vbo branch
Diffstat (limited to 'src/mesa/drivers/dri/i915tex/i830_texblend.c')
-rw-r--r-- | src/mesa/drivers/dri/i915tex/i830_texblend.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i915tex/i830_texblend.c b/src/mesa/drivers/dri/i915tex/i830_texblend.c new file mode 100644 index 0000000000..58f220eb7c --- /dev/null +++ b/src/mesa/drivers/dri/i915tex/i830_texblend.c @@ -0,0 +1,463 @@ +/************************************************************************** + * + * Copyright 2003 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. + * + **************************************************************************/ + +#include "glheader.h" +#include "macros.h" +#include "mtypes.h" +#include "simple_list.h" +#include "enums.h" +#include "texformat.h" +#include "texstore.h" + +#include "mm.h" + +#include "intel_screen.h" +#include "intel_ioctl.h" +#include "intel_tex.h" + +#include "i830_context.h" +#include "i830_reg.h" + + +/* ================================================================ + * Texture combine functions + */ +static GLuint +pass_through(GLuint * state, GLuint blendUnit) +{ + state[0] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) | + TEXPIPE_COLOR | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + DISABLE_TEX_CNTRL_STAGE | + TEXOP_SCALE_1X | TEXOP_MODIFY_PARMS | TEXBLENDOP_ARG1); + state[1] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) | + TEXPIPE_ALPHA | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + TEXOP_SCALE_1X | TEXOP_MODIFY_PARMS | TEXBLENDOP_ARG1); + state[2] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) | + TEXPIPE_COLOR | + TEXBLEND_ARG1 | + TEXBLENDARG_MODIFY_PARMS | TEXBLENDARG_CURRENT); + state[3] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) | + TEXPIPE_ALPHA | + TEXBLEND_ARG1 | + TEXBLENDARG_MODIFY_PARMS | TEXBLENDARG_CURRENT); + + return 4; +} + +static GLuint +emit_factor(GLuint blendUnit, GLuint * state, GLuint count, + const GLfloat * factor) +{ + GLubyte r, g, b, a; + GLuint col; + + if (0) + fprintf(stderr, "emit constant %d: %.2f %.2f %.2f %.2f\n", + blendUnit, factor[0], factor[1], factor[2], factor[3]); + + UNCLAMPED_FLOAT_TO_UBYTE(r, factor[0]); + UNCLAMPED_FLOAT_TO_UBYTE(g, factor[1]); + UNCLAMPED_FLOAT_TO_UBYTE(b, factor[2]); + UNCLAMPED_FLOAT_TO_UBYTE(a, factor[3]); + + col = ((a << 24) | (r << 16) | (g << 8) | b); + + state[count++] = _3DSTATE_COLOR_FACTOR_N_CMD(blendUnit); + state[count++] = col; + + return count; +} + + +static INLINE GLuint +GetTexelOp(GLint unit) +{ + switch (unit) { + case 0: + return TEXBLENDARG_TEXEL0; + case 1: + return TEXBLENDARG_TEXEL1; + case 2: + return TEXBLENDARG_TEXEL2; + case 3: + return TEXBLENDARG_TEXEL3; + default: + return TEXBLENDARG_TEXEL0; + } +} + + +/** + * Calculate the hardware instuctions to setup the current texture enviromnemt + * settings. Since \c gl_texture_unit::_CurrentCombine is used, both + * "classic" texture enviroments and GL_ARB_texture_env_combine type texture + * environments are treated identically. + * + * \todo + * This function should return \c GLboolean. When \c GL_FALSE is returned, + * it means that an environment is selected that the hardware cannot do. This + * is the way the Radeon and R200 drivers work. + * + * \todo + * Looking at i830_3d_regs.h, it seems the i830 can do part of + * GL_ATI_texture_env_combine3. It can handle using \c GL_ONE and + * \c GL_ZERO as combine inputs (which the code already supports). It can + * also handle the \c GL_MODULATE_ADD_ATI mode. Is it worth investigating + * partial support for the extension? + */ +GLuint +i830SetTexEnvCombine(struct i830_context * i830, + const struct gl_tex_env_combine_state * combine, + GLint blendUnit, + GLuint texel_op, GLuint * state, const GLfloat * factor) +{ + const GLuint numColorArgs = combine->_NumArgsRGB; + const GLuint numAlphaArgs = combine->_NumArgsA; + + GLuint blendop; + GLuint ablendop; + GLuint args_RGB[3]; + GLuint args_A[3]; + GLuint rgb_shift; + GLuint alpha_shift; + GLboolean need_factor = 0; + int i; + unsigned used; + static const GLuint tex_blend_rgb[3] = { + TEXPIPE_COLOR | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_COLOR | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_COLOR | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS, + }; + static const GLuint tex_blend_a[3] = { + TEXPIPE_ALPHA | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_ALPHA | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_ALPHA | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS, + }; + + if (INTEL_DEBUG & DEBUG_TEXTURE) + fprintf(stderr, "%s\n", __FUNCTION__); + + + /* The EXT version of the DOT3 extension does not support the + * scale factor, but the ARB version (and the version in OpenGL + * 1.3) does. + */ + switch (combine->ModeRGB) { + case GL_DOT3_RGB_EXT: + alpha_shift = combine->ScaleShiftA; + rgb_shift = 0; + break; + + case GL_DOT3_RGBA_EXT: + alpha_shift = 0; + rgb_shift = 0; + break; + + default: + rgb_shift = combine->ScaleShiftRGB; + alpha_shift = combine->ScaleShiftA; + break; + } + + + switch (combine->ModeRGB) { + case GL_REPLACE: + blendop = TEXBLENDOP_ARG1; + break; + case GL_MODULATE: + blendop = TEXBLENDOP_MODULATE; + break; + case GL_ADD: + blendop = TEXBLENDOP_ADD; + break; + case GL_ADD_SIGNED: + blendop = TEXBLENDOP_ADDSIGNED; + break; + case GL_INTERPOLATE: + blendop = TEXBLENDOP_BLEND; + break; + case GL_SUBTRACT: + blendop = TEXBLENDOP_SUBTRACT; + break; + case GL_DOT3_RGB_EXT: + case GL_DOT3_RGB: + blendop = TEXBLENDOP_DOT3; + break; + case GL_DOT3_RGBA_EXT: + case GL_DOT3_RGBA: + blendop = TEXBLENDOP_DOT3; + break; + default: + return pass_through(state, blendUnit); + } + + blendop |= (rgb_shift << TEXOP_SCALE_SHIFT); + + + /* Handle RGB args */ + for (i = 0; i < 3; i++) { + switch (combine->SourceRGB[i]) { + case GL_TEXTURE: + args_RGB[i] = texel_op; + break; + case GL_TEXTURE0: + case GL_TEXTURE1: + case GL_TEXTURE2: + case GL_TEXTURE3: + args_RGB[i] = GetTexelOp(combine->SourceRGB[i] - GL_TEXTURE0); + break; + case GL_CONSTANT: + args_RGB[i] = TEXBLENDARG_FACTOR_N; + need_factor = 1; + break; + case GL_PRIMARY_COLOR: + args_RGB[i] = TEXBLENDARG_DIFFUSE; + break; + case GL_PREVIOUS: + args_RGB[i] = TEXBLENDARG_CURRENT; + break; + default: + return pass_through(state, blendUnit); + } + + switch (combine->OperandRGB[i]) { + case GL_SRC_COLOR: + args_RGB[i] |= 0; + break; + case GL_ONE_MINUS_SRC_COLOR: + args_RGB[i] |= TEXBLENDARG_INV_ARG; + break; + case GL_SRC_ALPHA: + args_RGB[i] |= TEXBLENDARG_REPLICATE_ALPHA; + break; + case GL_ONE_MINUS_SRC_ALPHA: + args_RGB[i] |= (TEXBLENDARG_REPLICATE_ALPHA | TEXBLENDARG_INV_ARG); + break; + default: + return pass_through(state, blendUnit); + } + } + + + /* Need to knobble the alpha calculations of TEXBLENDOP_DOT4 to + * match the spec. Can't use DOT3 as it won't propogate values + * into alpha as required: + * + * Note - the global factor is set up with alpha == .5, so + * the alpha part of the DOT4 calculation should be zero. + */ + if (combine->ModeRGB == GL_DOT3_RGBA_EXT || + combine->ModeRGB == GL_DOT3_RGBA) { + ablendop = TEXBLENDOP_DOT4; + args_A[0] = TEXBLENDARG_FACTOR; /* the global factor */ + args_A[1] = TEXBLENDARG_FACTOR; + args_A[2] = TEXBLENDARG_FACTOR; + } + else { + switch (combine->ModeA) { + case GL_REPLACE: + ablendop = TEXBLENDOP_ARG1; + break; + case GL_MODULATE: + ablendop = TEXBLENDOP_MODULATE; + break; + case GL_ADD: + ablendop = TEXBLENDOP_ADD; + break; + case GL_ADD_SIGNED: + ablendop = TEXBLENDOP_ADDSIGNED; + break; + case GL_INTERPOLATE: + ablendop = TEXBLENDOP_BLEND; + break; + case GL_SUBTRACT: + ablendop = TEXBLENDOP_SUBTRACT; + break; + default: + return pass_through(state, blendUnit); + } + + + ablendop |= (alpha_shift << TEXOP_SCALE_SHIFT); + + /* Handle A args */ + for (i = 0; i < 3; i++) { + switch (combine->SourceA[i]) { + case GL_TEXTURE: + args_A[i] = texel_op; + break; + case GL_TEXTURE0: + case GL_TEXTURE1: + case GL_TEXTURE2: + case GL_TEXTURE3: + args_A[i] = GetTexelOp(combine->SourceA[i] - GL_TEXTURE0); + break; + case GL_CONSTANT: + args_A[i] = TEXBLENDARG_FACTOR_N; + need_factor = 1; + break; + case GL_PRIMARY_COLOR: + args_A[i] = TEXBLENDARG_DIFFUSE; + break; + case GL_PREVIOUS: + args_A[i] = TEXBLENDARG_CURRENT; + break; + default: + return pass_through(state, blendUnit); + } + + switch (combine->OperandA[i]) { + case GL_SRC_ALPHA: + args_A[i] |= 0; + break; + case GL_ONE_MINUS_SRC_ALPHA: + args_A[i] |= TEXBLENDARG_INV_ARG; + break; + default: + return pass_through(state, blendUnit); + } + } + } + + + + /* Native Arg1 == Arg0 in GL_EXT_texture_env_combine spec */ + /* Native Arg2 == Arg1 in GL_EXT_texture_env_combine spec */ + /* Native Arg0 == Arg2 in GL_EXT_texture_env_combine spec */ + + /* When we render we need to figure out which is the last really enabled + * tex unit, and put last stage on it + */ + + + /* Build color & alpha pipelines */ + + used = 0; + state[used++] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) | + TEXPIPE_COLOR | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + DISABLE_TEX_CNTRL_STAGE | TEXOP_MODIFY_PARMS | blendop); + state[used++] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) | + TEXPIPE_ALPHA | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | TEXOP_MODIFY_PARMS | ablendop); + + for (i = 0; i < numColorArgs; i++) { + state[used++] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) | + tex_blend_rgb[i] | args_RGB[i]); + } + + for (i = 0; i < numAlphaArgs; i++) { + state[used++] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) | + tex_blend_a[i] | args_A[i]); + } + + + if (need_factor) + return emit_factor(blendUnit, state, used, factor); + else + return used; +} + + +static void +emit_texblend(struct i830_context *i830, GLuint unit, GLuint blendUnit, + GLboolean last_stage) +{ + struct gl_texture_unit *texUnit = &i830->intel.ctx.Texture.Unit[unit]; + GLuint tmp[I830_TEXBLEND_SIZE], tmp_sz; + + + if (0) + fprintf(stderr, "%s unit %d\n", __FUNCTION__, unit); + + /* Update i830->state.TexBlend + */ + tmp_sz = i830SetTexEnvCombine(i830, texUnit->_CurrentCombine, blendUnit, + GetTexelOp(unit), tmp, texUnit->EnvColor); + + if (last_stage) + tmp[0] |= TEXOP_LAST_STAGE; + + if (tmp_sz != i830->state.TexBlendWordsUsed[blendUnit] || + memcmp(tmp, i830->state.TexBlend[blendUnit], + tmp_sz * sizeof(GLuint))) { + + I830_STATECHANGE(i830, I830_UPLOAD_TEXBLEND(blendUnit)); + memcpy(i830->state.TexBlend[blendUnit], tmp, tmp_sz * sizeof(GLuint)); + i830->state.TexBlendWordsUsed[blendUnit] = tmp_sz; + } + + I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND(blendUnit), GL_TRUE); +} + +static void +emit_passthrough(struct i830_context *i830) +{ + GLuint tmp[I830_TEXBLEND_SIZE], tmp_sz; + GLuint unit = 0; + + tmp_sz = pass_through(tmp, unit); + tmp[0] |= TEXOP_LAST_STAGE; + + if (tmp_sz != i830->state.TexBlendWordsUsed[unit] || + memcmp(tmp, i830->state.TexBlend[unit], tmp_sz * sizeof(GLuint))) { + + I830_STATECHANGE(i830, I830_UPLOAD_TEXBLEND(unit)); + memcpy(i830->state.TexBlend[unit], tmp, tmp_sz * sizeof(GLuint)); + i830->state.TexBlendWordsUsed[unit] = tmp_sz; + } + + I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND(unit), GL_TRUE); +} + +void +i830EmitTextureBlend(struct i830_context *i830) +{ + GLcontext *ctx = &i830->intel.ctx; + GLuint unit, last_stage = 0, blendunit = 0; + + I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND_ALL, GL_FALSE); + + if (ctx->Texture._EnabledUnits) { + for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) + if (ctx->Texture.Unit[unit]._ReallyEnabled) + last_stage = unit; + + for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) + if (ctx->Texture.Unit[unit]._ReallyEnabled) + emit_texblend(i830, unit, blendunit++, last_stage == unit); + } + else { + emit_passthrough(i830); + } +} |