+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 7.5
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- * Copyright (C) 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
- * BRIAN PAUL 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.
- */
-
-/**
- * \file texenv.c
- *
- * glTexEnv-related functions
- */
-
-#include <precomp.h>
-
-#define TE_ERROR(errCode, msg, value) \
- _mesa_error(ctx, errCode, msg, _mesa_lookup_enum_by_nr(value));
-
-
-/** Set texture env mode */
-static void
-set_env_mode(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- GLenum mode)
-{
- GLboolean legal;
-
- if (texUnit->EnvMode == mode)
- return;
-
- switch (mode) {
- case GL_MODULATE:
- case GL_BLEND:
- case GL_DECAL:
- case GL_REPLACE:
- case GL_ADD:
- case GL_COMBINE:
- legal = GL_TRUE;
- break;
- case GL_REPLACE_EXT:
- mode = GL_REPLACE; /* GL_REPLACE_EXT != GL_REPLACE */
- legal = GL_TRUE;
- break;
- case GL_COMBINE4_NV:
- legal = ctx->Extensions.NV_texture_env_combine4;
- break;
- default:
- legal = GL_FALSE;
- }
-
- if (legal) {
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->EnvMode = mode;
- }
- else {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
- }
-}
-
-
-static void
-set_env_color(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- const GLfloat *color)
-{
- if (TEST_EQ_4V(color, texUnit->EnvColor))
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- COPY_4FV(texUnit->EnvColor, color);
-}
-
-
-/** Set an RGB or A combiner mode/function */
-static void
-set_combiner_mode(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- GLenum pname, GLenum mode)
-{
- GLboolean legal;
-
- switch (mode) {
- case GL_REPLACE:
- case GL_MODULATE:
- case GL_ADD:
- case GL_ADD_SIGNED:
- case GL_INTERPOLATE:
- legal = GL_TRUE;
- break;
- case GL_SUBTRACT:
- legal = ctx->Extensions.ARB_texture_env_combine;
- break;
- case GL_DOT3_RGB_EXT:
- case GL_DOT3_RGBA_EXT:
- legal = (ctx->Extensions.EXT_texture_env_dot3 &&
- pname == GL_COMBINE_RGB);
- break;
- case GL_DOT3_RGB:
- case GL_DOT3_RGBA:
- legal = (ctx->Extensions.ARB_texture_env_dot3 &&
- pname == GL_COMBINE_RGB);
- break;
- case GL_MODULATE_ADD_ATI:
- case GL_MODULATE_SIGNED_ADD_ATI:
- case GL_MODULATE_SUBTRACT_ATI:
- legal = ctx->Extensions.ATI_texture_env_combine3;
- break;
- default:
- legal = GL_FALSE;
- }
-
- if (!legal) {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
- return;
- }
-
- switch (pname) {
- case GL_COMBINE_RGB:
- if (texUnit->Combine.ModeRGB == mode)
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->Combine.ModeRGB = mode;
- break;
-
- case GL_COMBINE_ALPHA:
- if (texUnit->Combine.ModeA == mode)
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->Combine.ModeA = mode;
- break;
- default:
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- }
-}
-
-
-
-/** Set an RGB or A combiner source term */
-static void
-set_combiner_source(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- GLenum pname, GLenum param)
-{
- GLuint term;
- GLboolean alpha, legal;
-
- /*
- * Translate pname to (term, alpha).
- *
- * The enums were given sequential values for a reason.
- */
- switch (pname) {
- case GL_SOURCE0_RGB:
- case GL_SOURCE1_RGB:
- case GL_SOURCE2_RGB:
- case GL_SOURCE3_RGB_NV:
- term = pname - GL_SOURCE0_RGB;
- alpha = GL_FALSE;
- break;
- case GL_SOURCE0_ALPHA:
- case GL_SOURCE1_ALPHA:
- case GL_SOURCE2_ALPHA:
- case GL_SOURCE3_ALPHA_NV:
- term = pname - GL_SOURCE0_ALPHA;
- alpha = GL_TRUE;
- break;
- default:
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- return;
- }
-
- if ((term == 3) && !ctx->Extensions.NV_texture_env_combine4) {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- return;
- }
-
- assert(term < MAX_COMBINER_TERMS);
-
- /*
- * Error-check param (the source term)
- */
- switch (param) {
- case GL_TEXTURE:
- case GL_CONSTANT:
- case GL_PRIMARY_COLOR:
- case GL_PREVIOUS:
- legal = GL_TRUE;
- break;
- case GL_ZERO:
- legal = (ctx->Extensions.ATI_texture_env_combine3 ||
- ctx->Extensions.NV_texture_env_combine4);
- break;
- case GL_ONE:
- legal = ctx->Extensions.ATI_texture_env_combine3;
- break;
- default:
- legal = GL_FALSE;
- }
-
- if (!legal) {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", param);
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
-
- if (alpha)
- texUnit->Combine.SourceA[term] = param;
- else
- texUnit->Combine.SourceRGB[term] = param;
-}
-
-
-/** Set an RGB or A combiner operand term */
-static void
-set_combiner_operand(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- GLenum pname, GLenum param)
-{
- GLuint term;
- GLboolean alpha, legal;
-
- /* The enums were given sequential values for a reason.
- */
- switch (pname) {
- case GL_OPERAND0_RGB:
- case GL_OPERAND1_RGB:
- case GL_OPERAND2_RGB:
- case GL_OPERAND3_RGB_NV:
- term = pname - GL_OPERAND0_RGB;
- alpha = GL_FALSE;
- break;
- case GL_OPERAND0_ALPHA:
- case GL_OPERAND1_ALPHA:
- case GL_OPERAND2_ALPHA:
- case GL_OPERAND3_ALPHA_NV:
- term = pname - GL_OPERAND0_ALPHA;
- alpha = GL_TRUE;
- break;
- default:
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- return;
- }
-
- if ((term == 3) && !ctx->Extensions.NV_texture_env_combine4) {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- return;
- }
-
- assert(term < MAX_COMBINER_TERMS);
-
- /*
- * Error-check param (the source operand)
- */
- switch (param) {
- case GL_SRC_COLOR:
- case GL_ONE_MINUS_SRC_COLOR:
- /* The color input can only be used with GL_OPERAND[01]_RGB in the EXT
- * version. In the ARB and NV versions they can be used for any RGB
- * operand.
- */
- legal = !alpha
- && ((term < 2) || ctx->Extensions.ARB_texture_env_combine
- || ctx->Extensions.NV_texture_env_combine4);
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- /* GL_ONE_MINUS_SRC_ALPHA can only be used with
- * GL_OPERAND[01]_(RGB|ALPHA) in the EXT version. In the ARB and NV
- * versions it can be used for any operand.
- */
- legal = (term < 2) || ctx->Extensions.ARB_texture_env_combine
- || ctx->Extensions.NV_texture_env_combine4;
- break;
- case GL_SRC_ALPHA:
- legal = GL_TRUE;
- break;
- default:
- legal = GL_FALSE;
- }
-
- if (!legal) {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", param);
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
-
- if (alpha)
- texUnit->Combine.OperandA[term] = param;
- else
- texUnit->Combine.OperandRGB[term] = param;
-}
-
-
-static void
-set_combiner_scale(struct gl_context *ctx,
- struct gl_texture_unit *texUnit,
- GLenum pname, GLfloat scale)
-{
- GLuint shift;
-
- if (scale == 1.0F) {
- shift = 0;
- }
- else if (scale == 2.0F) {
- shift = 1;
- }
- else if (scale == 4.0F) {
- shift = 2;
- }
- else {
- _mesa_error( ctx, GL_INVALID_VALUE,
- "glTexEnv(GL_RGB_SCALE not 1, 2 or 4)" );
- return;
- }
-
- switch (pname) {
- case GL_RGB_SCALE:
- if (texUnit->Combine.ScaleShiftRGB == shift)
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->Combine.ScaleShiftRGB = shift;
- break;
- case GL_ALPHA_SCALE:
- if (texUnit->Combine.ScaleShiftA == shift)
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->Combine.ScaleShiftA = shift;
- break;
- default:
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- }
-}
-
-
-
-void GLAPIENTRY
-_mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
-{
- const GLint iparam0 = (GLint) param[0];
- struct gl_texture_unit *texUnit;
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- texUnit = &ctx->Texture.Unit;
-
- if (target == GL_TEXTURE_ENV) {
- switch (pname) {
- case GL_TEXTURE_ENV_MODE:
- set_env_mode(ctx, texUnit, (GLenum) iparam0);
- break;
- case GL_TEXTURE_ENV_COLOR:
- set_env_color(ctx, texUnit, param);
- break;
- case GL_COMBINE_RGB:
- case GL_COMBINE_ALPHA:
- set_combiner_mode(ctx, texUnit, pname, (GLenum) iparam0);
- break;
- case GL_SOURCE0_RGB:
- case GL_SOURCE1_RGB:
- case GL_SOURCE2_RGB:
- case GL_SOURCE3_RGB_NV:
- case GL_SOURCE0_ALPHA:
- case GL_SOURCE1_ALPHA:
- case GL_SOURCE2_ALPHA:
- case GL_SOURCE3_ALPHA_NV:
- set_combiner_source(ctx, texUnit, pname, (GLenum) iparam0);
- break;
- case GL_OPERAND0_RGB:
- case GL_OPERAND1_RGB:
- case GL_OPERAND2_RGB:
- case GL_OPERAND3_RGB_NV:
- case GL_OPERAND0_ALPHA:
- case GL_OPERAND1_ALPHA:
- case GL_OPERAND2_ALPHA:
- case GL_OPERAND3_ALPHA_NV:
- set_combiner_operand(ctx, texUnit, pname, (GLenum) iparam0);
- break;
- case GL_RGB_SCALE:
- case GL_ALPHA_SCALE:
- set_combiner_scale(ctx, texUnit, pname, param[0]);
- break;
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname)" );
- return;
- }
- }
- else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
- if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
- if (texUnit->LodBias == param[0])
- return;
- FLUSH_VERTICES(ctx, _NEW_TEXTURE);
- texUnit->LodBias = param[0];
- }
- else {
- TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
- return;
- }
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)",target );
- return;
- }
-
- if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
- _mesa_debug(ctx, "glTexEnv %s %s %.1f(%s) ...\n",
- _mesa_lookup_enum_by_nr(target),
- _mesa_lookup_enum_by_nr(pname),
- *param,
- _mesa_lookup_enum_by_nr((GLenum) iparam0));
-
- /* Tell device driver about the new texture environment */
- if (ctx->Driver.TexEnv) {
- (*ctx->Driver.TexEnv)( ctx, target, pname, param );
- }
-}
-
-
-void GLAPIENTRY
-_mesa_TexEnvf( GLenum target, GLenum pname, GLfloat param )
-{
- GLfloat p[4];
- p[0] = param;
- p[1] = p[2] = p[3] = 0.0;
- _mesa_TexEnvfv( target, pname, p );
-}
-
-
-
-void GLAPIENTRY
-_mesa_TexEnvi( GLenum target, GLenum pname, GLint param )
-{
- GLfloat p[4];
- p[0] = (GLfloat) param;
- p[1] = p[2] = p[3] = 0.0;
- _mesa_TexEnvfv( target, pname, p );
-}
-
-
-void GLAPIENTRY
-_mesa_TexEnviv( GLenum target, GLenum pname, const GLint *param )
-{
- GLfloat p[4];
- if (pname == GL_TEXTURE_ENV_COLOR) {
- p[0] = INT_TO_FLOAT( param[0] );
- p[1] = INT_TO_FLOAT( param[1] );
- p[2] = INT_TO_FLOAT( param[2] );
- p[3] = INT_TO_FLOAT( param[3] );
- }
- else {
- p[0] = (GLfloat) param[0];
- p[1] = p[2] = p[3] = 0; /* init to zero, just to be safe */
- }
- _mesa_TexEnvfv( target, pname, p );
-}
-
-
-
-/**
- * Helper for glGetTexEnvi/f()
- * \return value of queried pname or -1 if error.
- */
-static GLint
-get_texenvi(struct gl_context *ctx, const struct gl_texture_unit *texUnit,
- GLenum pname)
-{
- switch (pname) {
- case GL_TEXTURE_ENV_MODE:
- return texUnit->EnvMode;
- break;
- case GL_COMBINE_RGB:
- return texUnit->Combine.ModeRGB;
- case GL_COMBINE_ALPHA:
- return texUnit->Combine.ModeA;
- case GL_SOURCE0_RGB:
- case GL_SOURCE1_RGB:
- case GL_SOURCE2_RGB: {
- const unsigned rgb_idx = pname - GL_SOURCE0_RGB;
- return texUnit->Combine.SourceRGB[rgb_idx];
- }
- case GL_SOURCE3_RGB_NV:
- if (ctx->Extensions.NV_texture_env_combine4) {
- return texUnit->Combine.SourceRGB[3];
- }
- else {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
- }
- break;
- case GL_SOURCE0_ALPHA:
- case GL_SOURCE1_ALPHA:
- case GL_SOURCE2_ALPHA: {
- const unsigned alpha_idx = pname - GL_SOURCE0_ALPHA;
- return texUnit->Combine.SourceA[alpha_idx];
- }
- case GL_SOURCE3_ALPHA_NV:
- if (ctx->Extensions.NV_texture_env_combine4) {
- return texUnit->Combine.SourceA[3];
- }
- else {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
- }
- break;
- case GL_OPERAND0_RGB:
- case GL_OPERAND1_RGB:
- case GL_OPERAND2_RGB: {
- const unsigned op_rgb = pname - GL_OPERAND0_RGB;
- return texUnit->Combine.OperandRGB[op_rgb];
- }
- case GL_OPERAND3_RGB_NV:
- if (ctx->Extensions.NV_texture_env_combine4) {
- return texUnit->Combine.OperandRGB[3];
- }
- else {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
- }
- break;
- case GL_OPERAND0_ALPHA:
- case GL_OPERAND1_ALPHA:
- case GL_OPERAND2_ALPHA: {
- const unsigned op_alpha = pname - GL_OPERAND0_ALPHA;
- return texUnit->Combine.OperandA[op_alpha];
- }
- case GL_OPERAND3_ALPHA_NV:
- if (ctx->Extensions.NV_texture_env_combine4) {
- return texUnit->Combine.OperandA[3];
- }
- else {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
- }
- break;
- case GL_RGB_SCALE:
- return 1 << texUnit->Combine.ScaleShiftRGB;
- case GL_ALPHA_SCALE:
- return 1 << texUnit->Combine.ScaleShiftA;
-
- default:
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
- break;
- }
-
- return -1; /* error */
-}
-
-
-
-void GLAPIENTRY
-_mesa_GetTexEnvfv( GLenum target, GLenum pname, GLfloat *params )
-{
- GET_CURRENT_CONTEXT(ctx);
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (target == GL_TEXTURE_ENV) {
- if (pname == GL_TEXTURE_ENV_COLOR) {
- if(ctx->NewState & _NEW_BUFFERS)
- _mesa_update_state(ctx);
- COPY_4FV( params, texUnit->EnvColor );
- }
- else {
- GLint val = get_texenvi(ctx, texUnit, pname);
- if (val >= 0) {
- *params = (GLfloat) val;
- }
- }
- }
- else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
- if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
- *params = texUnit->LodBias;
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" );
- return;
- }
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" );
- return;
- }
-}
-
-
-void GLAPIENTRY
-_mesa_GetTexEnviv( GLenum target, GLenum pname, GLint *params )
-{
- GET_CURRENT_CONTEXT(ctx);
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit;;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (target == GL_TEXTURE_ENV) {
- if (pname == GL_TEXTURE_ENV_COLOR) {
- params[0] = FLOAT_TO_INT( texUnit->EnvColor[0] );
- params[1] = FLOAT_TO_INT( texUnit->EnvColor[1] );
- params[2] = FLOAT_TO_INT( texUnit->EnvColor[2] );
- params[3] = FLOAT_TO_INT( texUnit->EnvColor[3] );
- }
- else {
- GLint val = get_texenvi(ctx, texUnit, pname);
- if (val >= 0) {
- *params = val;
- }
- }
- }
- else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
- if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
- *params = (GLint) texUnit->LodBias;
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" );
- return;
- }
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" );
- return;
- }
-}
-
-
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