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Diffstat (limited to 'src/mesa/drivers/dri/mga/mga_texcombine.c')
-rw-r--r--src/mesa/drivers/dri/mga/mga_texcombine.c672
1 files changed, 0 insertions, 672 deletions
diff --git a/src/mesa/drivers/dri/mga/mga_texcombine.c b/src/mesa/drivers/dri/mga/mga_texcombine.c
deleted file mode 100644
index 1488a89..0000000
--- a/src/mesa/drivers/dri/mga/mga_texcombine.c
+++ /dev/null
@@ -1,672 +0,0 @@
-/*
- * Copyright (c) 2003 Ville Syrjala
- *
- * 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.
- *
- * Authors:
- * Ville Syrjala <syrjala@sci.fi>
- */
-
-#include "main/glheader.h"
-
-#include "mgacontext.h"
-#include "mgatex.h"
-#include "mgaregs.h"
-
-/*
- * GL_ARB_texture_env_combine
- * GL_EXT_texture_env_combine
- * GL_ARB_texture_env_crossbar
- * GL_ATI_texture_env_combine3
- */
-
-#define ARG_DISABLE 0xffffffff
-#define MGA_ARG1 0
-#define MGA_ARG2 1
-#define MGA_ALPHA 2
-
-GLboolean mgaUpdateTextureEnvCombine( struct gl_context *ctx, int unit )
-{
- mgaContextPtr mmesa = MGA_CONTEXT(ctx);
- const int source = mmesa->tmu_source[unit];
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source];
- GLuint *reg = ((GLuint *)&mmesa->setup.tdualstage0 + unit);
- GLuint numColorArgs = 0, numAlphaArgs = 0;
- GLuint arg1[3], arg2[3], alpha[3];
- int args[3];
- int i;
-
- switch (texUnit->Combine.ModeRGB) {
- case GL_REPLACE:
- numColorArgs = 1;
- break;
- case GL_MODULATE:
- case GL_ADD:
- case GL_ADD_SIGNED:
- case GL_SUBTRACT:
- numColorArgs = 2;
- break;
- case GL_INTERPOLATE:
- case GL_MODULATE_ADD_ATI:
- case GL_MODULATE_SIGNED_ADD_ATI:
- case GL_MODULATE_SUBTRACT_ATI:
- numColorArgs = 3;
- break;
- default:
- return GL_FALSE;
- }
-
- switch (texUnit->Combine.ModeA) {
- case GL_REPLACE:
- numAlphaArgs = 1;
- break;
- case GL_MODULATE:
- case GL_ADD:
- case GL_ADD_SIGNED:
- case GL_SUBTRACT:
- numAlphaArgs = 2;
- break;
- default:
- return GL_FALSE;
- }
-
- /* Start fresh :) */
- *reg = 0;
-
- /* COLOR */
- for (i = 0; i < 3; i++) {
- arg1[i] = 0;
- arg2[i] = 0;
- alpha[i] = 0;
- }
-
- for (i = 0;i < numColorArgs; i++) {
- switch (texUnit->Combine.SourceRGB[i]) {
- case GL_TEXTURE:
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- alpha[i] |= TD0_color_alpha_currtex;
- break;
- case GL_TEXTURE0:
- if (source == 0) {
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- alpha[i] |= TD0_color_alpha_currtex;
- } else {
- if (ctx->Texture._EnabledUnits != 0x03) {
- /* disable texturing */
- mmesa->setup.dwgctl &= DC_opcod_MASK;
- mmesa->setup.dwgctl |= DC_opcod_trap;
- mmesa->hw.alpha_sel = AC_alphasel_diffused;
- /* return GL_TRUE since we don't need a fallback */
- return GL_TRUE;
- }
- arg1[i] |= ARG_DISABLE;
- arg2[i] |= ARG_DISABLE;
- alpha[i] |= TD0_color_alpha_prevtex;
- }
- break;
- case GL_TEXTURE1:
- if (source == 0) {
- if (ctx->Texture._EnabledUnits != 0x03) {
- /* disable texturing */
- mmesa->setup.dwgctl &= DC_opcod_MASK;
- mmesa->setup.dwgctl |= DC_opcod_trap;
- mmesa->hw.alpha_sel = AC_alphasel_diffused;
- /* return GL_TRUE since we don't need a fallback */
- return GL_TRUE;
- }
- arg1[i] |= ARG_DISABLE;
- /* G400 specs (TDUALSTAGE0) */
- arg2[i] |= TD0_color_arg2_prevstage;
- alpha[i] |= TD0_color_alpha_prevstage;
- } else {
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- alpha[i] |= TD0_color_alpha_currtex;
- }
- break;
- case GL_CONSTANT:
- if (mmesa->fcol_used &&
- mmesa->envcolor[source] != mmesa->envcolor[!source])
- return GL_FALSE;
-
- arg1[i] |= ARG_DISABLE;
- arg2[i] |= TD0_color_arg2_fcol;
- alpha[i] |= TD0_color_alpha_fcol;
-
- mmesa->setup.fcol = mmesa->envcolor[source];
- mmesa->fcol_used = GL_TRUE;
- break;
- case GL_PRIMARY_COLOR:
- arg1[i] |= ARG_DISABLE;
- /* G400 specs (TDUALSTAGE1) */
- if (unit == 0 || (mmesa->setup.tdualstage0 &
- ((TD0_color_sel_mul & TD0_color_sel_add) |
- (TD0_alpha_sel_mul & TD0_alpha_sel_add)))) {
- arg2[i] |= TD0_color_arg2_diffuse;
- alpha[i] |= TD0_color_alpha_diffuse;
- } else {
- arg2[i] |= ARG_DISABLE;
- alpha[i] |= ARG_DISABLE;
- }
- break;
- case GL_PREVIOUS:
- arg1[i] |= ARG_DISABLE;
- if (unit == 0) {
- arg2[i] |= TD0_color_arg2_diffuse;
- alpha[i] |= TD0_color_alpha_diffuse;
- } else {
- arg2[i] |= TD0_color_arg2_prevstage;
- alpha[i] |= TD0_color_alpha_prevstage;
- }
- break;
- default:
- return GL_FALSE;
- }
-
- switch (texUnit->Combine.OperandRGB[i]) {
- case GL_SRC_COLOR:
- arg1[i] |= 0;
- arg2[i] |= 0;
- if (texUnit->Combine.SourceRGB[i] == GL_CONSTANT &&
- RGBA_EQUAL( mmesa->envcolor[source] )) {
- alpha[i] |= 0;
- } else {
- alpha[i] |= ARG_DISABLE;
- }
- break;
- case GL_ONE_MINUS_SRC_COLOR:
- arg1[i] |= TD0_color_arg1_inv_enable;
- arg2[i] |= TD0_color_arg2_inv_enable;
- if (texUnit->Combine.SourceRGB[i] == GL_CONSTANT &&
- RGBA_EQUAL( mmesa->envcolor[source] )) {
- alpha[i] |= (TD0_color_alpha1inv_enable |
- TD0_color_alpha2inv_enable);
- } else {
- alpha[i] |= ARG_DISABLE;
- }
- break;
- case GL_SRC_ALPHA:
- arg1[i] |= TD0_color_arg1_replicatealpha_enable;
- arg2[i] |= TD0_color_arg2_replicatealpha_enable;
- alpha[i] |= 0;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- arg1[i] |= (TD0_color_arg1_replicatealpha_enable |
- TD0_color_arg1_inv_enable);
- arg2[i] |= (TD0_color_arg2_replicatealpha_enable |
- TD0_color_arg2_inv_enable);
- alpha[i] |= (TD0_color_alpha1inv_enable |
- TD0_color_alpha2inv_enable);
- break;
- }
- }
-
- switch (texUnit->Combine.ModeRGB) {
- case GL_MODULATE_ADD_ATI:
- case GL_MODULATE_SIGNED_ADD_ATI:
- /* Special handling for ATI_texture_env_combine3.
- * If Arg1 == Arg0 or Arg1 == Arg2 we can use arg1 or arg2 as input for
- * both multiplier and adder.
- */
- /* Arg1 == arg1 */
- if (arg1[1] == arg1[0]) {
- if ((arg1[1] | arg2[2]) != ARG_DISABLE) {
- *reg |= arg1[1] | arg2[2];
- args[0] = MGA_ARG1; args[1] = MGA_ARG1; args[2] = MGA_ARG2;
- break;
- } else
- if ((arg1[1] | alpha[2]) != ARG_DISABLE) {
- *reg |= arg1[1] | alpha[2];
- args[0] = MGA_ARG1; args[1] = MGA_ARG1; args[2] = MGA_ALPHA;
- break;
- }
- }
- if (arg1[1] == arg1[2]) {
- if ((arg1[1] | arg2[0]) != ARG_DISABLE) {
- *reg |= arg1[1] | arg2[0];
- args[0] = MGA_ARG2; args[1] = MGA_ARG1; args[2] = MGA_ARG1;
- break;
- } else
- if ((arg1[1] | alpha[0]) != ARG_DISABLE) {
- *reg |= arg1[1] | alpha[0];
- args[0] = MGA_ALPHA; args[1] = MGA_ARG1; args[2] = MGA_ARG1;
- break;
- }
- }
- /* fallthrough */
- case GL_MODULATE_SUBTRACT_ATI:
- /* Arg1 == arg2 */
- if (arg2[1] == arg2[0]) {
- if ((arg2[1] | arg1[2]) != ARG_DISABLE) {
- *reg |= arg2[1] | arg1[2];
- args[0] = MGA_ARG2; args[1] = MGA_ARG2; args[2] = MGA_ARG1;
- break;
- } else
- if ((arg2[1] | alpha[2]) != ARG_DISABLE) {
- *reg |= arg2[1] | alpha[2];
- args[0] = MGA_ARG2; args[1] = MGA_ARG2; args[2] = MGA_ALPHA;
- break;
- }
- }
- if (arg2[1] == arg2[2]) {
- if ((arg2[1] | arg1[0]) != ARG_DISABLE) {
- *reg |= arg2[1] | arg1[0];
- args[0] = MGA_ARG1; args[1] = MGA_ARG2; args[2] = MGA_ARG2;
- break;
- } else
- if ((arg2[1] | alpha[0]) != ARG_DISABLE) {
- *reg |= arg2[1] | alpha[0];
- args[0] = MGA_ALPHA; args[1] = MGA_ARG2; args[2] = MGA_ARG2;
- break;
- }
- }
- /* fallthrough */
- default:
- /* Find working combo of arg1, arg2 and alpha.
- *
- * Keep the Arg0 != alpha cases first since there's
- * no way to get alpha out by itself (GL_REPLACE).
- *
- * Keep the Arg2 == alpha cases first because only alpha has the
- * capabilities to function as Arg2 (GL_INTERPOLATE). Also good for
- * GL_ADD, GL_ADD_SIGNED, GL_SUBTRACT since we can't get alpha to the
- * adder.
- *
- * Keep the Arg1 == alpha cases last for GL_MODULATE_ADD_ATI,
- * GL_MODULATE_SIGNED_ADD_ATI. Again because we can't get alpha to the
- * adder.
- *
- * GL_MODULATE_SUBTRACT_ATI needs special treatment since it requires
- * that Arg1 == arg2. This requirement clashes with those of other modes.
- */
- if ((arg1[0] | arg2[1] | alpha[2]) != ARG_DISABLE) {
- *reg |= arg1[0] | arg2[1] | alpha[2];
- args[0] = MGA_ARG1; args[1] = MGA_ARG2; args[2] = MGA_ALPHA;
- } else
- if ((arg1[1] | arg2[0] | alpha[2]) != ARG_DISABLE &&
- texUnit->Combine.ModeRGB != GL_MODULATE_SUBTRACT_ATI) {
- *reg |= arg1[1] | arg2[0] | alpha[2];
- args[0] = MGA_ARG2; args[1] = MGA_ARG1; args[2] = MGA_ALPHA;
- } else
- if ((arg1[1] | arg2[2] | alpha[0]) != ARG_DISABLE &&
- texUnit->Combine.ModeRGB != GL_MODULATE_SUBTRACT_ATI) {
- *reg |= arg1[1] | arg2[2] | alpha[0];
- args[0] = MGA_ALPHA; args[1] = MGA_ARG1; args[2] = MGA_ARG2;
- } else
- if ((arg1[2] | arg2[1] | alpha[0]) != ARG_DISABLE) {
- *reg |= arg1[2] | arg2[1] | alpha[0];
- args[0] = MGA_ALPHA; args[1] = MGA_ARG2; args[2] = MGA_ARG1;
- } else
- if ((arg1[0] | arg2[2] | alpha[1]) != ARG_DISABLE) {
- *reg |= arg1[0] | arg2[2] | alpha[1];
- args[0] = MGA_ARG1; args[1] = MGA_ALPHA; args[2] = MGA_ARG2;
- } else
- if ((arg1[2] | arg2[0] | alpha[1]) != ARG_DISABLE) {
- *reg |= arg1[2] | arg2[0] | alpha[1];
- args[0] = MGA_ARG2; args[1] = MGA_ALPHA; args[2] = MGA_ARG1;
- } else {
- /* nothing suitable */
- return GL_FALSE;
- }
- }
-
- switch (texUnit->Combine.ModeRGB) {
- case GL_REPLACE:
- if (texUnit->Combine.ScaleShiftRGB) {
- return GL_FALSE;
- }
-
- if (args[0] == MGA_ARG1) {
- *reg |= TD0_color_sel_arg1;
- } else if (args[0] == MGA_ARG2) {
- *reg |= TD0_color_sel_arg2;
- } else if (args[0] == MGA_ALPHA) {
- /* Can't get alpha out by itself */
- return GL_FALSE;
- }
- break;
- case GL_MODULATE:
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_modbright_2x;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- *reg |= TD0_color_modbright_4x;
- }
-
- *reg |= TD0_color_sel_mul;
-
- if (args[0] == MGA_ALPHA || args[1] == MGA_ALPHA) {
- if (args[0] == MGA_ARG1 || args[1] == MGA_ARG1) {
- *reg |= TD0_color_arg2mul_alpha2;
- } else if (args[0] == MGA_ARG2 || args[1] == MGA_ARG2) {
- *reg |= TD0_color_arg1mul_alpha1;
- }
- }
- break;
- case GL_ADD_SIGNED:
- *reg |= TD0_color_addbias_enable;
- /* fallthrough */
- case GL_ADD:
- if (args[0] == MGA_ALPHA || args[1] == MGA_ALPHA) {
- /* Can't get alpha to the adder */
- return GL_FALSE;
- }
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_color_add_add |
- TD0_color_sel_add);
- break;
- case GL_INTERPOLATE:
- if (args[2] != MGA_ALPHA) {
- /* Only alpha can function as Arg2 */
- return GL_FALSE;
- }
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_color_arg1mul_alpha1 |
- TD0_color_blend_enable |
- TD0_color_arg1add_mulout |
- TD0_color_arg2add_mulout |
- TD0_color_add_add |
- TD0_color_sel_add);
-
- /* Have to do this with xor since GL_ONE_MINUS_SRC_ALPHA may have
- * already touched this bit.
- */
- *reg ^= TD0_color_alpha1inv_enable;
-
- if (args[0] == MGA_ARG2) {
- /* Swap arguments */
- *reg ^= (TD0_color_arg1mul_alpha1 |
- TD0_color_arg2mul_alpha2 |
- TD0_color_alpha1inv_enable |
- TD0_color_alpha2inv_enable);
- }
-
- if (ctx->Texture._EnabledUnits != 0x03) {
- /* Linear blending mode needs dualtex enabled */
- *(reg+1) = (TD0_color_arg2_prevstage |
- TD0_color_sel_arg2 |
- TD0_alpha_arg2_prevstage |
- TD0_alpha_sel_arg2);
- mmesa->force_dualtex = GL_TRUE;
- }
- break;
- case GL_SUBTRACT:
- if (args[0] == MGA_ALPHA || args[1] == MGA_ALPHA) {
- /* Can't get alpha to the adder */
- return GL_FALSE;
- }
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_color_add_sub |
- TD0_color_sel_add);
-
- if (args[0] == MGA_ARG2) {
- /* Swap arguments */
- *reg ^= (TD0_color_arg1_inv_enable |
- TD0_color_arg2_inv_enable);
- }
- break;
- case GL_MODULATE_SIGNED_ADD_ATI:
- *reg |= TD0_color_addbias_enable;
- /* fallthrough */
- case GL_MODULATE_ADD_ATI:
- if (args[1] == MGA_ALPHA) {
- /* Can't get alpha to the adder */
- return GL_FALSE;
- }
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_color_add_add |
- TD0_color_sel_add);
-
- if (args[1] == args[0] || args[1] == args[2]) {
- *reg |= TD0_color_arg1add_mulout;
- if (args[0] == MGA_ALPHA || args[2] == MGA_ALPHA)
- *reg |= TD0_color_arg1mul_alpha1;
-
- if (args[1] == MGA_ARG1) {
- /* Swap adder arguments */
- *reg ^= (TD0_color_arg1add_mulout |
- TD0_color_arg2add_mulout);
- if (args[0] == MGA_ALPHA || args[2] == MGA_ALPHA) {
- /* Swap multiplier arguments */
- *reg ^= (TD0_color_arg1mul_alpha1 |
- TD0_color_arg2mul_alpha2);
- }
- }
- } else {
- *reg |= (TD0_color_arg2mul_alpha2 |
- TD0_color_arg1add_mulout);
-
- if (args[1] == MGA_ARG1) {
- /* Swap arguments */
- *reg ^= (TD0_color_arg1mul_alpha1 |
- TD0_color_arg2mul_alpha2 |
- TD0_color_arg1add_mulout |
- TD0_color_arg2add_mulout);
- }
- }
- break;
- case GL_MODULATE_SUBTRACT_ATI:
- if (args[1] != MGA_ARG2) {
- /* Can't swap arguments */
- return GL_FALSE;
- }
- if (texUnit->Combine.ScaleShiftRGB == 1) {
- *reg |= TD0_color_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftRGB == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_color_add_sub |
- TD0_color_sel_add);
-
- if (args[1] == args[0] || args[1] == args[2]) {
- *reg |= TD0_color_arg1add_mulout;
- if (args[0] == MGA_ALPHA || args[2] == MGA_ALPHA)
- *reg |= TD0_color_arg1mul_alpha1;
- } else {
- *reg |= (TD0_color_arg2mul_alpha2 |
- TD0_color_arg1add_mulout);
- }
- break;
- }
-
-
- /* ALPHA */
- for (i = 0; i < 2; i++) {
- arg1[i] = 0;
- arg2[i] = 0;
- }
-
- for (i = 0; i < numAlphaArgs; i++) {
- switch (texUnit->Combine.SourceA[i]) {
- case GL_TEXTURE:
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- break;
- case GL_TEXTURE0:
- if (source == 0) {
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- } else {
- if (ctx->Texture._EnabledUnits != 0x03) {
- /* disable texturing */
- mmesa->setup.dwgctl &= DC_opcod_MASK;
- mmesa->setup.dwgctl |= DC_opcod_trap;
- mmesa->hw.alpha_sel = AC_alphasel_diffused;
- /* return GL_TRUE since we don't need a fallback */
- return GL_TRUE;
- }
- arg1[i] |= ARG_DISABLE;
- arg2[i] |= TD0_alpha_arg2_prevtex;
- }
- break;
- case GL_TEXTURE1:
- if (source == 0) {
- if (ctx->Texture._EnabledUnits != 0x03) {
- /* disable texturing */
- mmesa->setup.dwgctl &= DC_opcod_MASK;
- mmesa->setup.dwgctl |= DC_opcod_trap;
- mmesa->hw.alpha_sel = AC_alphasel_diffused;
- /* return GL_TRUE since we don't need a fallback */
- return GL_TRUE;
- }
- arg1[i] |= ARG_DISABLE;
- /* G400 specs (TDUALSTAGE0) */
- arg2[i] |= TD0_alpha_arg2_prevstage;
- } else {
- arg1[i] |= 0;
- arg2[i] |= ARG_DISABLE;
- }
- break;
- case GL_CONSTANT:
- if (mmesa->fcol_used &&
- mmesa->envcolor[source] != mmesa->envcolor[!source])
- return GL_FALSE;
-
- arg1[i] |= ARG_DISABLE;
- arg2[i] |= TD0_alpha_arg2_fcol;
-
- mmesa->setup.fcol = mmesa->envcolor[source];
- mmesa->fcol_used = GL_TRUE;
- break;
- case GL_PRIMARY_COLOR:
- arg1[i] |= ARG_DISABLE;
- /* G400 specs (TDUALSTAGE1) */
- if (unit == 0 || (mmesa->setup.tdualstage0 &
- ((TD0_color_sel_mul & TD0_color_sel_add) |
- (TD0_alpha_sel_mul & TD0_alpha_sel_add)))) {
- arg2[i] |= TD0_alpha_arg2_diffuse;
- } else {
- arg2[i] |= ARG_DISABLE;
- }
- break;
- case GL_PREVIOUS:
- arg1[i] |= ARG_DISABLE;
- if (unit == 0) {
- arg2[i] |= TD0_alpha_arg2_diffuse;
- } else {
- arg2[i] |= TD0_alpha_arg2_prevstage;
- }
- break;
- default:
- return GL_FALSE;
- }
-
- switch (texUnit->Combine.OperandA[i]) {
- case GL_SRC_ALPHA:
- arg1[i] |= 0;
- arg2[i] |= 0;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- arg1[i] |= TD0_alpha_arg1_inv_enable;
- arg2[i] |= TD0_alpha_arg2_inv_enable;
- break;
- }
- }
-
- /* Find a working combo of arg1 and arg2 */
- if ((arg1[0] | arg2[1]) != ARG_DISABLE) {
- *reg |= arg1[0] | arg2[1];
- args[0] = MGA_ARG1; args[1] = MGA_ARG2;
- } else
- if ((arg1[1] | arg2[0]) != ARG_DISABLE) {
- *reg |= arg1[1] | arg2[0];
- args[0] = MGA_ARG2; args[1] = MGA_ARG1;
- } else {
- /* nothing suitable */
- return GL_FALSE;
- }
-
- switch (texUnit->Combine.ModeA) {
- case GL_REPLACE:
- if (texUnit->Combine.ScaleShiftA) {
- return GL_FALSE;
- }
-
- if (args[0] == MGA_ARG1) {
- *reg |= TD0_alpha_sel_arg1;
- } else if (args[0] == MGA_ARG2) {
- *reg |= TD0_alpha_sel_arg2;
- }
- break;
- case GL_MODULATE:
- if (texUnit->Combine.ScaleShiftA == 1) {
- *reg |= TD0_alpha_modbright_2x;
- } else if (texUnit->Combine.ScaleShiftA == 2) {
- *reg |= TD0_alpha_modbright_4x;
- }
-
- *reg |= TD0_alpha_sel_mul;
- break;
- case GL_ADD_SIGNED:
- *reg |= TD0_alpha_addbias_enable;
- /* fallthrough */
- case GL_ADD:
- if (texUnit->Combine.ScaleShiftA == 1) {
- *reg |= TD0_alpha_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftA == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_alpha_add_enable |
- TD0_alpha_sel_add);
- break;
- case GL_SUBTRACT:
- if (texUnit->Combine.ScaleShiftA == 1) {
- *reg |= TD0_alpha_add2x_enable;
- } else if (texUnit->Combine.ScaleShiftA == 2) {
- return GL_FALSE;
- }
-
- *reg |= (TD0_alpha_add_disable |
- TD0_alpha_sel_add);
-
- if (args[0] == MGA_ARG2) {
- /* Swap arguments */
- *reg ^= (TD0_alpha_arg1_inv_enable |
- TD0_alpha_arg2_inv_enable);
- }
- break;
- }
-
- return GL_TRUE;
-}
-
-
generated by cgit v1.1 at 2025-05-19 17:48:33 +0000