| /* |
| * Mesa 3-D graphics library |
| * |
| * 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 |
| * 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. |
| */ |
| |
| /** |
| * \file texenv.c |
| * |
| * glTexEnv-related functions |
| */ |
| |
| |
| #include "main/glheader.h" |
| #include "main/context.h" |
| #include "main/blend.h" |
| #include "main/enums.h" |
| #include "main/macros.h" |
| #include "main/mtypes.h" |
| #include "main/state.h" |
| #include "main/texenv.h" |
| #include "main/texstate.h" |
| |
| |
| #define TE_ERROR(errCode, msg, value) \ |
| _mesa_error(ctx, errCode, msg, _mesa_enum_to_string(value)); |
| |
| |
| /** Set texture env mode */ |
| static void |
| set_env_mode(struct gl_context *ctx, |
| struct gl_fixedfunc_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_STATE); |
| texUnit->EnvMode = mode; |
| } |
| else { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode); |
| } |
| } |
| |
| |
| static void |
| set_env_color(struct gl_context *ctx, |
| struct gl_fixedfunc_texture_unit *texUnit, |
| const GLfloat *color) |
| { |
| if (TEST_EQ_4V(color, texUnit->EnvColorUnclamped)) |
| return; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| COPY_4FV(texUnit->EnvColorUnclamped, color); |
| texUnit->EnvColor[0] = CLAMP(color[0], 0.0F, 1.0F); |
| texUnit->EnvColor[1] = CLAMP(color[1], 0.0F, 1.0F); |
| texUnit->EnvColor[2] = CLAMP(color[2], 0.0F, 1.0F); |
| texUnit->EnvColor[3] = CLAMP(color[3], 0.0F, 1.0F); |
| } |
| |
| |
| /** Set an RGB or A combiner mode/function */ |
| static bool |
| set_combiner_mode(struct gl_context *ctx, |
| struct gl_fixedfunc_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->API == API_OPENGL_COMPAT && |
| 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->API == API_OPENGL_COMPAT && |
| ctx->Extensions.ATI_texture_env_combine3); |
| break; |
| default: |
| legal = GL_FALSE; |
| } |
| |
| if (!legal) { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode); |
| return false; |
| } |
| |
| switch (pname) { |
| case GL_COMBINE_RGB: |
| if (texUnit->Combine.ModeRGB == mode) |
| return true; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| texUnit->Combine.ModeRGB = mode; |
| break; |
| |
| case GL_COMBINE_ALPHA: |
| if (texUnit->Combine.ModeA == mode) |
| return true; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| texUnit->Combine.ModeA = mode; |
| break; |
| default: |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| |
| |
| /** Set an RGB or A combiner source term */ |
| static bool |
| set_combiner_source(struct gl_context *ctx, |
| struct gl_fixedfunc_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 false; |
| } |
| |
| if ((term == 3) && (ctx->API != API_OPENGL_COMPAT |
| || !ctx->Extensions.NV_texture_env_combine4)) { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
| return false; |
| } |
| |
| 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_TEXTURE0: |
| case GL_TEXTURE1: |
| case GL_TEXTURE2: |
| case GL_TEXTURE3: |
| case GL_TEXTURE4: |
| case GL_TEXTURE5: |
| case GL_TEXTURE6: |
| case GL_TEXTURE7: |
| legal = (ctx->Extensions.ARB_texture_env_crossbar && |
| param - GL_TEXTURE0 < ctx->Const.MaxTextureUnits); |
| break; |
| case GL_ZERO: |
| legal = (ctx->API == API_OPENGL_COMPAT && |
| (ctx->Extensions.ATI_texture_env_combine3 || |
| ctx->Extensions.NV_texture_env_combine4)); |
| break; |
| case GL_ONE: |
| legal = (ctx->API == API_OPENGL_COMPAT && |
| ctx->Extensions.ATI_texture_env_combine3); |
| break; |
| default: |
| legal = GL_FALSE; |
| } |
| |
| if (!legal) { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", param); |
| return false; |
| } |
| |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| |
| if (alpha) |
| texUnit->Combine.SourceA[term] = param; |
| else |
| texUnit->Combine.SourceRGB[term] = param; |
| |
| return true; |
| } |
| |
| |
| /** Set an RGB or A combiner operand term */ |
| static bool |
| set_combiner_operand(struct gl_context *ctx, |
| struct gl_fixedfunc_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 false; |
| } |
| |
| if ((term == 3) && (ctx->API != API_OPENGL_COMPAT |
| || !ctx->Extensions.NV_texture_env_combine4)) { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
| return false; |
| } |
| |
| 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 and OpenGL ES 1.x 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 and OpenGL ES 1.x 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 false; |
| } |
| |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| |
| if (alpha) |
| texUnit->Combine.OperandA[term] = param; |
| else |
| texUnit->Combine.OperandRGB[term] = param; |
| |
| return true; |
| } |
| |
| |
| static bool |
| set_combiner_scale(struct gl_context *ctx, |
| struct gl_fixedfunc_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 false; |
| } |
| |
| switch (pname) { |
| case GL_RGB_SCALE: |
| if (texUnit->Combine.ScaleShiftRGB == shift) |
| return true; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| texUnit->Combine.ScaleShiftRGB = shift; |
| break; |
| case GL_ALPHA_SCALE: |
| if (texUnit->Combine.ScaleShiftA == shift) |
| return true; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE); |
| texUnit->Combine.ScaleShiftA = shift; |
| break; |
| default: |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| |
| static void |
| _mesa_texenvfv_indexed( struct gl_context* ctx, GLuint texunit, GLenum target, |
| GLenum pname, const GLfloat *param ) |
| { |
| const GLint iparam0 = (GLint) param[0]; |
| GLuint maxUnit; |
| |
| maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
| ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
| if (texunit >= maxUnit) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "glTexEnvfv(texunit=%d)", texunit); |
| return; |
| } |
| |
| if (target == GL_TEXTURE_ENV) { |
| struct gl_fixedfunc_texture_unit *texUnit = |
| _mesa_get_fixedfunc_tex_unit(ctx, texunit); |
| |
| /* The GL spec says that we should report an error if the unit is greater |
| * than GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, but in practice, only |
| * fixed-function units are usable. This is probably a spec bug. |
| * Ignore glTexEnv(GL_TEXTURE_ENV) calls for non-fixed-func units, |
| * because we don't want to process calls that have no effect. |
| */ |
| if (!texUnit) |
| return; |
| |
| 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: |
| if (!set_combiner_mode(ctx, texUnit, pname, (GLenum) iparam0)) |
| return; |
| 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: |
| if (!set_combiner_source(ctx, texUnit, pname, (GLenum) iparam0)) |
| return; |
| 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: |
| if (!set_combiner_operand(ctx, texUnit, pname, (GLenum) iparam0)) |
| return; |
| break; |
| case GL_RGB_SCALE: |
| case GL_ALPHA_SCALE: |
| if (!set_combiner_scale(ctx, texUnit, pname, param[0])) |
| return; |
| break; |
| default: |
| _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname)" ); |
| return; |
| } |
| } |
| else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) { |
| struct gl_texture_unit *texUnit = |
| _mesa_get_tex_unit(ctx, texunit); |
| |
| if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
| if (texUnit->LodBias == param[0]) |
| return; |
| FLUSH_VERTICES(ctx, _NEW_TEXTURE_OBJECT); |
| texUnit->LodBias = param[0]; |
| } |
| else { |
| TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
| return; |
| } |
| } |
| else if (target == GL_POINT_SPRITE_NV) { |
| /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
| if (!ctx->Extensions.NV_point_sprite |
| && !ctx->Extensions.ARB_point_sprite) { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)", target ); |
| return; |
| } |
| if (pname == GL_COORD_REPLACE_NV) { |
| /* It's kind of weird to set point state via glTexEnv, |
| * but that's what the spec calls for. |
| */ |
| if (iparam0 == GL_TRUE) { |
| if (ctx->Point.CoordReplace & (1u << texunit)) |
| return; |
| FLUSH_VERTICES(ctx, _NEW_POINT); |
| ctx->Point.CoordReplace |= (1u << texunit); |
| } else if (iparam0 == GL_FALSE) { |
| if (~(ctx->Point.CoordReplace) & (1u << texunit)) |
| return; |
| FLUSH_VERTICES(ctx, _NEW_POINT); |
| ctx->Point.CoordReplace &= ~(1u << texunit); |
| } else { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glTexEnv(param=0x%x)", iparam0); |
| return; |
| } |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname=0x%x)", pname ); |
| return; |
| } |
| } |
| else { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glTexEnv(target=%s)", |
| _mesa_enum_to_string(target)); |
| return; |
| } |
| |
| if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE)) |
| _mesa_debug(ctx, "glTexEnv %s %s %.1f(%s) ...\n", |
| _mesa_enum_to_string(target), |
| _mesa_enum_to_string(pname), |
| *param, |
| _mesa_enum_to_string((GLenum) iparam0)); |
| |
| /* Tell device driver about the new texture environment */ |
| if (ctx->Driver.TexEnv) { |
| ctx->Driver.TexEnv(ctx, target, pname, param); |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| _mesa_texenvfv_indexed(ctx, ctx->Texture.CurrentUnit, 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 ); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_MultiTexEnvfEXT( GLenum texunit, GLenum target, |
| GLenum pname, GLfloat param ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLfloat p[4]; |
| p[0] = param; |
| p[1] = p[2] = p[3] = 0.0; |
| _mesa_texenvfv_indexed(ctx, texunit - GL_TEXTURE0, target, pname, p); |
| } |
| |
| void GLAPIENTRY |
| _mesa_MultiTexEnvfvEXT( GLenum texunit, GLenum target, |
| GLenum pname, const GLfloat *param ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| _mesa_texenvfv_indexed(ctx, texunit - GL_TEXTURE0, target, pname, param); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_MultiTexEnviEXT( GLenum texunit, GLenum target, |
| GLenum pname, GLint param ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLfloat p[4]; |
| p[0] = (GLfloat) param; |
| p[1] = p[2] = p[3] = 0.0; |
| _mesa_texenvfv_indexed( ctx, texunit - GL_TEXTURE0, target, pname, p ); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_MultiTexEnvivEXT( GLenum texunit, GLenum target, |
| GLenum pname, const GLint *param ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| 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_indexed( ctx, texunit - GL_TEXTURE0, 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_fixedfunc_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->API == API_OPENGL_COMPAT && 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->API == API_OPENGL_COMPAT && 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->API == API_OPENGL_COMPAT && 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->API == API_OPENGL_COMPAT && 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 */ |
| } |
| |
| |
| static void |
| _mesa_gettexenvfv_indexed( GLuint texunit, GLenum target, GLenum pname, GLfloat *params ) |
| { |
| GLuint maxUnit; |
| GET_CURRENT_CONTEXT(ctx); |
| |
| maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
| ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
| if (texunit >= maxUnit) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexEnvfv(texunit=%d)", texunit); |
| return; |
| } |
| |
| if (target == GL_TEXTURE_ENV) { |
| struct gl_fixedfunc_texture_unit *texUnit = |
| _mesa_get_fixedfunc_tex_unit(ctx, texunit); |
| |
| /* The GL spec says that we should report an error if the unit is greater |
| * than GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, but in practice, only |
| * fixed-function units are usable. This is probably a spec bug. |
| * Ignore calls for non-fixed-func units, because we don't process |
| * glTexEnv for them either. |
| */ |
| if (!texUnit) |
| return; |
| |
| if (pname == GL_TEXTURE_ENV_COLOR) { |
| if (_mesa_get_clamp_fragment_color(ctx, ctx->DrawBuffer)) |
| COPY_4FV( params, texUnit->EnvColor ); |
| else |
| COPY_4FV( params, texUnit->EnvColorUnclamped ); |
| } |
| else { |
| GLint val = get_texenvi(ctx, texUnit, pname); |
| if (val >= 0) { |
| *params = (GLfloat) val; |
| } |
| } |
| } |
| else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) { |
| const struct gl_texture_unit *texUnit = _mesa_get_tex_unit(ctx, texunit); |
| |
| if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
| *params = texUnit->LodBias; |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" ); |
| return; |
| } |
| } |
| else if (target == GL_POINT_SPRITE_NV) { |
| /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
| if (!ctx->Extensions.NV_point_sprite |
| && !ctx->Extensions.ARB_point_sprite) { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" ); |
| return; |
| } |
| if (pname == GL_COORD_REPLACE_NV) { |
| if (ctx->Point.CoordReplace & (1u << texunit)) |
| *params = 1.0f; |
| else |
| *params = 0.0f; |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" ); |
| return; |
| } |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" ); |
| return; |
| } |
| } |
| |
| |
| static void |
| _mesa_gettexenviv_indexed( GLuint texunit, GLenum target, |
| GLenum pname, GLint *params ) |
| { |
| GLuint maxUnit; |
| GET_CURRENT_CONTEXT(ctx); |
| |
| maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
| ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
| if (texunit >= maxUnit) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexEnviv(texunit=%d)", |
| texunit); |
| return; |
| } |
| |
| if (target == GL_TEXTURE_ENV) { |
| struct gl_fixedfunc_texture_unit *texUnit = |
| _mesa_get_fixedfunc_tex_unit(ctx, texunit); |
| |
| /* The GL spec says that we should report an error if the unit is greater |
| * than GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, but in practice, only |
| * fixed-function units are usable. This is probably a spec bug. |
| * Ignore calls for non-fixed-func units, because we don't process |
| * glTexEnv for them either. |
| */ |
| if (!texUnit) |
| return; |
| |
| 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) { |
| const struct gl_texture_unit *texUnit = _mesa_get_tex_unit(ctx, texunit); |
| |
| if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
| *params = (GLint) texUnit->LodBias; |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" ); |
| return; |
| } |
| } |
| else if (target == GL_POINT_SPRITE_NV) { |
| /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
| if (!ctx->Extensions.NV_point_sprite |
| && !ctx->Extensions.ARB_point_sprite) { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" ); |
| return; |
| } |
| if (pname == GL_COORD_REPLACE_NV) { |
| if (ctx->Point.CoordReplace & (1u << texunit)) |
| *params = GL_TRUE; |
| else |
| *params = GL_FALSE; |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" ); |
| return; |
| } |
| } |
| else { |
| _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" ); |
| return; |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetTexEnvfv( GLenum target, GLenum pname, GLfloat *params ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| _mesa_gettexenvfv_indexed(ctx->Texture.CurrentUnit, target, pname, params); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetMultiTexEnvfvEXT( GLenum texunit, GLenum target, |
| GLenum pname, GLfloat *params ) |
| { |
| _mesa_gettexenvfv_indexed(texunit - GL_TEXTURE0, target, pname, params); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetTexEnviv( GLenum target, GLenum pname, GLint *params ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| _mesa_gettexenviv_indexed(ctx->Texture.CurrentUnit, target, pname, params); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetMultiTexEnvivEXT( GLenum texunit, GLenum target, |
| GLenum pname, GLint *params ) |
| { |
| _mesa_gettexenviv_indexed(texunit - GL_TEXTURE0, target, pname, params); |
| } |