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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * |
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| 4 | * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
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| 5 | * Copyright (C) 2009 VMware, Inc. All Rights Reserved. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 21 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 22 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 23 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 24 | */ |
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| 25 | |||
| 26 | /** |
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| 27 | * \file texenv.c |
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| 28 | * |
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| 29 | * glTexEnv-related functions |
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| 30 | */ |
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| 31 | |||
| 32 | |||
| 33 | #include "main/glheader.h" |
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| 34 | #include "main/context.h" |
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| 35 | #include "main/blend.h" |
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| 36 | #include "main/enums.h" |
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| 37 | #include "main/macros.h" |
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| 38 | #include "main/mtypes.h" |
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| 39 | #include "main/state.h" |
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| 40 | #include "main/texenv.h" |
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| 41 | #include "main/texstate.h" |
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| 42 | |||
| 43 | |||
| 44 | #define TE_ERROR(errCode, msg, value) \ |
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| 45 | _mesa_error(ctx, errCode, msg, _mesa_lookup_enum_by_nr(value)); |
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| 46 | |||
| 47 | |||
| 48 | /** Set texture env mode */ |
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| 49 | static void |
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| 50 | set_env_mode(struct gl_context *ctx, |
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| 51 | struct gl_texture_unit *texUnit, |
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| 52 | GLenum mode) |
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| 53 | { |
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| 54 | GLboolean legal; |
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| 55 | |||
| 56 | if (texUnit->EnvMode == mode) |
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| 57 | return; |
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| 58 | |||
| 59 | switch (mode) { |
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| 60 | case GL_MODULATE: |
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| 61 | case GL_BLEND: |
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| 62 | case GL_DECAL: |
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| 63 | case GL_REPLACE: |
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| 64 | case GL_ADD: |
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| 65 | case GL_COMBINE: |
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| 66 | legal = GL_TRUE; |
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| 67 | break; |
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| 68 | case GL_REPLACE_EXT: |
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| 69 | mode = GL_REPLACE; /* GL_REPLACE_EXT != GL_REPLACE */ |
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| 70 | legal = GL_TRUE; |
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| 71 | break; |
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| 72 | case GL_COMBINE4_NV: |
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| 73 | legal = ctx->Extensions.NV_texture_env_combine4; |
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| 74 | break; |
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| 75 | default: |
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| 76 | legal = GL_FALSE; |
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| 77 | } |
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| 78 | |||
| 79 | if (legal) { |
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| 80 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 81 | texUnit->EnvMode = mode; |
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| 82 | } |
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| 83 | else { |
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| 84 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode); |
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| 85 | } |
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| 86 | } |
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| 87 | |||
| 88 | |||
| 89 | static void |
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| 90 | set_env_color(struct gl_context *ctx, |
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| 91 | struct gl_texture_unit *texUnit, |
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| 92 | const GLfloat *color) |
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| 93 | { |
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| 94 | if (TEST_EQ_4V(color, texUnit->EnvColorUnclamped)) |
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| 95 | return; |
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| 96 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 97 | COPY_4FV(texUnit->EnvColorUnclamped, color); |
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| 98 | texUnit->EnvColor[0] = CLAMP(color[0], 0.0F, 1.0F); |
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| 99 | texUnit->EnvColor[1] = CLAMP(color[1], 0.0F, 1.0F); |
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| 100 | texUnit->EnvColor[2] = CLAMP(color[2], 0.0F, 1.0F); |
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| 101 | texUnit->EnvColor[3] = CLAMP(color[3], 0.0F, 1.0F); |
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| 102 | } |
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| 103 | |||
| 104 | |||
| 105 | /** Set an RGB or A combiner mode/function */ |
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| 106 | static void |
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| 107 | set_combiner_mode(struct gl_context *ctx, |
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| 108 | struct gl_texture_unit *texUnit, |
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| 109 | GLenum pname, GLenum mode) |
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| 110 | { |
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| 111 | GLboolean legal; |
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| 112 | |||
| 113 | switch (mode) { |
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| 114 | case GL_REPLACE: |
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| 115 | case GL_MODULATE: |
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| 116 | case GL_ADD: |
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| 117 | case GL_ADD_SIGNED: |
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| 118 | case GL_INTERPOLATE: |
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| 119 | legal = GL_TRUE; |
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| 120 | break; |
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| 121 | case GL_SUBTRACT: |
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| 122 | legal = ctx->Extensions.ARB_texture_env_combine; |
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| 123 | break; |
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| 124 | case GL_DOT3_RGB_EXT: |
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| 125 | case GL_DOT3_RGBA_EXT: |
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| 126 | legal = (ctx->API == API_OPENGL_COMPAT && |
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| 127 | ctx->Extensions.EXT_texture_env_dot3 && |
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| 128 | pname == GL_COMBINE_RGB); |
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| 129 | break; |
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| 130 | case GL_DOT3_RGB: |
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| 131 | case GL_DOT3_RGBA: |
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| 132 | legal = (ctx->Extensions.ARB_texture_env_dot3 && |
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| 133 | pname == GL_COMBINE_RGB); |
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| 134 | break; |
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| 135 | case GL_MODULATE_ADD_ATI: |
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| 136 | case GL_MODULATE_SIGNED_ADD_ATI: |
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| 137 | case GL_MODULATE_SUBTRACT_ATI: |
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| 138 | legal = (ctx->API == API_OPENGL_COMPAT && |
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| 139 | ctx->Extensions.ATI_texture_env_combine3); |
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| 140 | break; |
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| 141 | default: |
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| 142 | legal = GL_FALSE; |
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| 143 | } |
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| 144 | |||
| 145 | if (!legal) { |
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| 146 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode); |
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| 147 | return; |
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| 148 | } |
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| 149 | |||
| 150 | switch (pname) { |
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| 151 | case GL_COMBINE_RGB: |
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| 152 | if (texUnit->Combine.ModeRGB == mode) |
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| 153 | return; |
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| 154 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 155 | texUnit->Combine.ModeRGB = mode; |
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| 156 | break; |
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| 157 | |||
| 158 | case GL_COMBINE_ALPHA: |
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| 159 | if (texUnit->Combine.ModeA == mode) |
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| 160 | return; |
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| 161 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 162 | texUnit->Combine.ModeA = mode; |
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| 163 | break; |
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| 164 | default: |
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| 165 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 166 | } |
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| 167 | } |
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| 168 | |||
| 169 | |||
| 170 | |||
| 171 | /** Set an RGB or A combiner source term */ |
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| 172 | static void |
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| 173 | set_combiner_source(struct gl_context *ctx, |
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| 174 | struct gl_texture_unit *texUnit, |
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| 175 | GLenum pname, GLenum param) |
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| 176 | { |
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| 177 | GLuint term; |
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| 178 | GLboolean alpha, legal; |
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| 179 | |||
| 180 | /* |
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| 181 | * Translate pname to (term, alpha). |
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| 182 | * |
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| 183 | * The enums were given sequential values for a reason. |
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| 184 | */ |
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| 185 | switch (pname) { |
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| 186 | case GL_SOURCE0_RGB: |
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| 187 | case GL_SOURCE1_RGB: |
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| 188 | case GL_SOURCE2_RGB: |
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| 189 | case GL_SOURCE3_RGB_NV: |
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| 190 | term = pname - GL_SOURCE0_RGB; |
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| 191 | alpha = GL_FALSE; |
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| 192 | break; |
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| 193 | case GL_SOURCE0_ALPHA: |
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| 194 | case GL_SOURCE1_ALPHA: |
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| 195 | case GL_SOURCE2_ALPHA: |
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| 196 | case GL_SOURCE3_ALPHA_NV: |
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| 197 | term = pname - GL_SOURCE0_ALPHA; |
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| 198 | alpha = GL_TRUE; |
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| 199 | break; |
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| 200 | default: |
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| 201 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 202 | return; |
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| 203 | } |
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| 204 | |||
| 205 | if ((term == 3) && (ctx->API != API_OPENGL_COMPAT |
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| 206 | || !ctx->Extensions.NV_texture_env_combine4)) { |
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| 207 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 208 | return; |
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| 209 | } |
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| 210 | |||
| 211 | assert(term < MAX_COMBINER_TERMS); |
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| 212 | |||
| 213 | /* |
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| 214 | * Error-check param (the source term) |
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| 215 | */ |
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| 216 | switch (param) { |
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| 217 | case GL_TEXTURE: |
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| 218 | case GL_CONSTANT: |
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| 219 | case GL_PRIMARY_COLOR: |
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| 220 | case GL_PREVIOUS: |
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| 221 | legal = GL_TRUE; |
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| 222 | break; |
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| 223 | case GL_TEXTURE0: |
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| 224 | case GL_TEXTURE1: |
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| 225 | case GL_TEXTURE2: |
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| 226 | case GL_TEXTURE3: |
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| 227 | case GL_TEXTURE4: |
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| 228 | case GL_TEXTURE5: |
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| 229 | case GL_TEXTURE6: |
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| 230 | case GL_TEXTURE7: |
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| 231 | legal = (ctx->Extensions.ARB_texture_env_crossbar && |
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| 232 | param - GL_TEXTURE0 < ctx->Const.MaxTextureUnits); |
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| 233 | break; |
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| 234 | case GL_ZERO: |
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| 235 | legal = (ctx->API == API_OPENGL_COMPAT && |
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| 236 | (ctx->Extensions.ATI_texture_env_combine3 || |
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| 237 | ctx->Extensions.NV_texture_env_combine4)); |
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| 238 | break; |
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| 239 | case GL_ONE: |
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| 240 | legal = (ctx->API == API_OPENGL_COMPAT && |
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| 241 | ctx->Extensions.ATI_texture_env_combine3); |
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| 242 | break; |
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| 243 | default: |
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| 244 | legal = GL_FALSE; |
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| 245 | } |
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| 246 | |||
| 247 | if (!legal) { |
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| 248 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", param); |
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| 249 | return; |
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| 250 | } |
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| 251 | |||
| 252 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 253 | |||
| 254 | if (alpha) |
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| 255 | texUnit->Combine.SourceA[term] = param; |
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| 256 | else |
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| 257 | texUnit->Combine.SourceRGB[term] = param; |
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| 258 | } |
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| 259 | |||
| 260 | |||
| 261 | /** Set an RGB or A combiner operand term */ |
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| 262 | static void |
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| 263 | set_combiner_operand(struct gl_context *ctx, |
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| 264 | struct gl_texture_unit *texUnit, |
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| 265 | GLenum pname, GLenum param) |
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| 266 | { |
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| 267 | GLuint term; |
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| 268 | GLboolean alpha, legal; |
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| 269 | |||
| 270 | /* The enums were given sequential values for a reason. |
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| 271 | */ |
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| 272 | switch (pname) { |
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| 273 | case GL_OPERAND0_RGB: |
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| 274 | case GL_OPERAND1_RGB: |
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| 275 | case GL_OPERAND2_RGB: |
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| 276 | case GL_OPERAND3_RGB_NV: |
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| 277 | term = pname - GL_OPERAND0_RGB; |
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| 278 | alpha = GL_FALSE; |
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| 279 | break; |
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| 280 | case GL_OPERAND0_ALPHA: |
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| 281 | case GL_OPERAND1_ALPHA: |
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| 282 | case GL_OPERAND2_ALPHA: |
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| 283 | case GL_OPERAND3_ALPHA_NV: |
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| 284 | term = pname - GL_OPERAND0_ALPHA; |
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| 285 | alpha = GL_TRUE; |
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| 286 | break; |
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| 287 | default: |
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| 288 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 289 | return; |
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| 290 | } |
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| 291 | |||
| 292 | if ((term == 3) && (ctx->API != API_OPENGL_COMPAT |
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| 293 | || !ctx->Extensions.NV_texture_env_combine4)) { |
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| 294 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 295 | return; |
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| 296 | } |
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| 297 | |||
| 298 | assert(term < MAX_COMBINER_TERMS); |
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| 299 | |||
| 300 | /* |
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| 301 | * Error-check param (the source operand) |
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| 302 | */ |
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| 303 | switch (param) { |
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| 304 | case GL_SRC_COLOR: |
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| 305 | case GL_ONE_MINUS_SRC_COLOR: |
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| 306 | /* The color input can only be used with GL_OPERAND[01]_RGB in the EXT |
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| 307 | * version. In the ARB and NV versions and OpenGL ES 1.x they can be |
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| 308 | * used for any RGB operand. |
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| 309 | */ |
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| 310 | legal = !alpha |
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| 311 | && ((term < 2) || ctx->Extensions.ARB_texture_env_combine |
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| 312 | || ctx->Extensions.NV_texture_env_combine4); |
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| 313 | break; |
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| 314 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 315 | /* GL_ONE_MINUS_SRC_ALPHA can only be used with |
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| 316 | * GL_OPERAND[01]_(RGB|ALPHA) in the EXT version. In the ARB and NV |
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| 317 | * versions and OpenGL ES 1.x it can be used for any operand. |
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| 318 | */ |
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| 319 | legal = (term < 2) || ctx->Extensions.ARB_texture_env_combine |
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| 320 | || ctx->Extensions.NV_texture_env_combine4; |
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| 321 | break; |
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| 322 | case GL_SRC_ALPHA: |
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| 323 | legal = GL_TRUE; |
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| 324 | break; |
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| 325 | default: |
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| 326 | legal = GL_FALSE; |
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| 327 | } |
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| 328 | |||
| 329 | if (!legal) { |
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| 330 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", param); |
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| 331 | return; |
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| 332 | } |
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| 333 | |||
| 334 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 335 | |||
| 336 | if (alpha) |
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| 337 | texUnit->Combine.OperandA[term] = param; |
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| 338 | else |
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| 339 | texUnit->Combine.OperandRGB[term] = param; |
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| 340 | } |
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| 341 | |||
| 342 | |||
| 343 | static void |
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| 344 | set_combiner_scale(struct gl_context *ctx, |
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| 345 | struct gl_texture_unit *texUnit, |
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| 346 | GLenum pname, GLfloat scale) |
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| 347 | { |
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| 348 | GLuint shift; |
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| 349 | |||
| 350 | if (scale == 1.0F) { |
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| 351 | shift = 0; |
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| 352 | } |
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| 353 | else if (scale == 2.0F) { |
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| 354 | shift = 1; |
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| 355 | } |
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| 356 | else if (scale == 4.0F) { |
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| 357 | shift = 2; |
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| 358 | } |
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| 359 | else { |
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| 360 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 361 | "glTexEnv(GL_RGB_SCALE not 1, 2 or 4)" ); |
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| 362 | return; |
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| 363 | } |
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| 364 | |||
| 365 | switch (pname) { |
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| 366 | case GL_RGB_SCALE: |
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| 367 | if (texUnit->Combine.ScaleShiftRGB == shift) |
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| 368 | return; |
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| 369 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 370 | texUnit->Combine.ScaleShiftRGB = shift; |
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| 371 | break; |
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| 372 | case GL_ALPHA_SCALE: |
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| 373 | if (texUnit->Combine.ScaleShiftA == shift) |
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| 374 | return; |
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| 375 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 376 | texUnit->Combine.ScaleShiftA = shift; |
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| 377 | break; |
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| 378 | default: |
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| 379 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 380 | } |
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| 381 | } |
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| 382 | |||
| 383 | |||
| 384 | |||
| 385 | void GLAPIENTRY |
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| 386 | _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param ) |
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| 387 | { |
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| 388 | const GLint iparam0 = (GLint) param[0]; |
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| 389 | struct gl_texture_unit *texUnit; |
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| 390 | GLuint maxUnit; |
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| 391 | GET_CURRENT_CONTEXT(ctx); |
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| 392 | |||
| 393 | maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
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| 394 | ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
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| 395 | if (ctx->Texture.CurrentUnit >= maxUnit) { |
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| 396 | _mesa_error(ctx, GL_INVALID_OPERATION, "glTexEnvfv(current unit)"); |
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| 397 | return; |
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| 398 | } |
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| 399 | |||
| 400 | texUnit = _mesa_get_current_tex_unit(ctx); |
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| 401 | |||
| 402 | if (target == GL_TEXTURE_ENV) { |
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| 403 | switch (pname) { |
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| 404 | case GL_TEXTURE_ENV_MODE: |
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| 405 | set_env_mode(ctx, texUnit, (GLenum) iparam0); |
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| 406 | break; |
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| 407 | case GL_TEXTURE_ENV_COLOR: |
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| 408 | set_env_color(ctx, texUnit, param); |
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| 409 | break; |
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| 410 | case GL_COMBINE_RGB: |
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| 411 | case GL_COMBINE_ALPHA: |
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| 412 | set_combiner_mode(ctx, texUnit, pname, (GLenum) iparam0); |
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| 413 | break; |
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| 414 | case GL_SOURCE0_RGB: |
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| 415 | case GL_SOURCE1_RGB: |
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| 416 | case GL_SOURCE2_RGB: |
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| 417 | case GL_SOURCE3_RGB_NV: |
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| 418 | case GL_SOURCE0_ALPHA: |
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| 419 | case GL_SOURCE1_ALPHA: |
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| 420 | case GL_SOURCE2_ALPHA: |
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| 421 | case GL_SOURCE3_ALPHA_NV: |
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| 422 | set_combiner_source(ctx, texUnit, pname, (GLenum) iparam0); |
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| 423 | break; |
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| 424 | case GL_OPERAND0_RGB: |
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| 425 | case GL_OPERAND1_RGB: |
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| 426 | case GL_OPERAND2_RGB: |
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| 427 | case GL_OPERAND3_RGB_NV: |
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| 428 | case GL_OPERAND0_ALPHA: |
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| 429 | case GL_OPERAND1_ALPHA: |
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| 430 | case GL_OPERAND2_ALPHA: |
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| 431 | case GL_OPERAND3_ALPHA_NV: |
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| 432 | set_combiner_operand(ctx, texUnit, pname, (GLenum) iparam0); |
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| 433 | break; |
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| 434 | case GL_RGB_SCALE: |
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| 435 | case GL_ALPHA_SCALE: |
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| 436 | set_combiner_scale(ctx, texUnit, pname, param[0]); |
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| 437 | break; |
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| 438 | default: |
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| 439 | _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname)" ); |
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| 440 | return; |
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| 441 | } |
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| 442 | } |
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| 443 | else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) { |
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| 444 | if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
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| 445 | if (texUnit->LodBias == param[0]) |
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| 446 | return; |
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| 447 | FLUSH_VERTICES(ctx, _NEW_TEXTURE); |
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| 448 | texUnit->LodBias = param[0]; |
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| 449 | } |
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| 450 | else { |
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| 451 | TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname); |
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| 452 | return; |
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| 453 | } |
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| 454 | } |
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| 455 | else if (target == GL_POINT_SPRITE_NV) { |
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| 456 | /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
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| 457 | if (!ctx->Extensions.NV_point_sprite |
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| 458 | && !ctx->Extensions.ARB_point_sprite) { |
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| 459 | _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)", target ); |
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| 460 | return; |
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| 461 | } |
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| 462 | if (pname == GL_COORD_REPLACE_NV) { |
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| 463 | if (iparam0 == GL_TRUE || iparam0 == GL_FALSE) { |
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| 464 | /* It's kind of weird to set point state via glTexEnv, |
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| 465 | * but that's what the spec calls for. |
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| 466 | */ |
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| 467 | const GLboolean state = (GLboolean) iparam0; |
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| 468 | if (ctx->Point.CoordReplace[ctx->Texture.CurrentUnit] == state) |
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| 469 | return; |
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| 470 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 471 | ctx->Point.CoordReplace[ctx->Texture.CurrentUnit] = state; |
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| 472 | } |
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| 473 | else { |
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| 474 | _mesa_error( ctx, GL_INVALID_VALUE, "glTexEnv(param=0x%x)", iparam0); |
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| 475 | return; |
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| 476 | } |
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| 477 | } |
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| 478 | else { |
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| 479 | _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname=0x%x)", pname ); |
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| 480 | return; |
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| 481 | } |
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| 482 | } |
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| 483 | else { |
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| 484 | _mesa_error(ctx, GL_INVALID_ENUM, "glTexEnv(target=%s)", |
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| 485 | _mesa_lookup_enum_by_nr(target)); |
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| 486 | return; |
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| 487 | } |
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| 488 | |||
| 489 | if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE)) |
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| 490 | _mesa_debug(ctx, "glTexEnv %s %s %.1f(%s) ...\n", |
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| 491 | _mesa_lookup_enum_by_nr(target), |
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| 492 | _mesa_lookup_enum_by_nr(pname), |
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| 493 | *param, |
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| 494 | _mesa_lookup_enum_by_nr((GLenum) iparam0)); |
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| 495 | |||
| 496 | /* Tell device driver about the new texture environment */ |
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| 497 | if (ctx->Driver.TexEnv) { |
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| 498 | (*ctx->Driver.TexEnv)( ctx, target, pname, param ); |
||
| 499 | } |
||
| 500 | } |
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| 501 | |||
| 502 | |||
| 503 | void GLAPIENTRY |
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| 504 | _mesa_TexEnvf( GLenum target, GLenum pname, GLfloat param ) |
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| 505 | { |
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| 506 | GLfloat p[4]; |
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| 507 | p[0] = param; |
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| 508 | p[1] = p[2] = p[3] = 0.0; |
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| 509 | _mesa_TexEnvfv( target, pname, p ); |
||
| 510 | } |
||
| 511 | |||
| 512 | |||
| 513 | |||
| 514 | void GLAPIENTRY |
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| 515 | _mesa_TexEnvi( GLenum target, GLenum pname, GLint param ) |
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| 516 | { |
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| 517 | GLfloat p[4]; |
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| 518 | p[0] = (GLfloat) param; |
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| 519 | p[1] = p[2] = p[3] = 0.0; |
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| 520 | _mesa_TexEnvfv( target, pname, p ); |
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| 521 | } |
||
| 522 | |||
| 523 | |||
| 524 | void GLAPIENTRY |
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| 525 | _mesa_TexEnviv( GLenum target, GLenum pname, const GLint *param ) |
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| 526 | { |
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| 527 | GLfloat p[4]; |
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| 528 | if (pname == GL_TEXTURE_ENV_COLOR) { |
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| 529 | p[0] = INT_TO_FLOAT( param[0] ); |
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| 530 | p[1] = INT_TO_FLOAT( param[1] ); |
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| 531 | p[2] = INT_TO_FLOAT( param[2] ); |
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| 532 | p[3] = INT_TO_FLOAT( param[3] ); |
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| 533 | } |
||
| 534 | else { |
||
| 535 | p[0] = (GLfloat) param[0]; |
||
| 536 | p[1] = p[2] = p[3] = 0; /* init to zero, just to be safe */ |
||
| 537 | } |
||
| 538 | _mesa_TexEnvfv( target, pname, p ); |
||
| 539 | } |
||
| 540 | |||
| 541 | |||
| 542 | |||
| 543 | /** |
||
| 544 | * Helper for glGetTexEnvi/f() |
||
| 545 | * \return value of queried pname or -1 if error. |
||
| 546 | */ |
||
| 547 | static GLint |
||
| 548 | get_texenvi(struct gl_context *ctx, const struct gl_texture_unit *texUnit, |
||
| 549 | GLenum pname) |
||
| 550 | { |
||
| 551 | switch (pname) { |
||
| 552 | case GL_TEXTURE_ENV_MODE: |
||
| 553 | return texUnit->EnvMode; |
||
| 554 | break; |
||
| 555 | case GL_COMBINE_RGB: |
||
| 556 | return texUnit->Combine.ModeRGB; |
||
| 557 | case GL_COMBINE_ALPHA: |
||
| 558 | return texUnit->Combine.ModeA; |
||
| 559 | case GL_SOURCE0_RGB: |
||
| 560 | case GL_SOURCE1_RGB: |
||
| 561 | case GL_SOURCE2_RGB: { |
||
| 562 | const unsigned rgb_idx = pname - GL_SOURCE0_RGB; |
||
| 563 | return texUnit->Combine.SourceRGB[rgb_idx]; |
||
| 564 | } |
||
| 565 | case GL_SOURCE3_RGB_NV: |
||
| 566 | if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.NV_texture_env_combine4) { |
||
| 567 | return texUnit->Combine.SourceRGB[3]; |
||
| 568 | } |
||
| 569 | else { |
||
| 570 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)"); |
||
| 571 | } |
||
| 572 | break; |
||
| 573 | case GL_SOURCE0_ALPHA: |
||
| 574 | case GL_SOURCE1_ALPHA: |
||
| 575 | case GL_SOURCE2_ALPHA: { |
||
| 576 | const unsigned alpha_idx = pname - GL_SOURCE0_ALPHA; |
||
| 577 | return texUnit->Combine.SourceA[alpha_idx]; |
||
| 578 | } |
||
| 579 | case GL_SOURCE3_ALPHA_NV: |
||
| 580 | if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.NV_texture_env_combine4) { |
||
| 581 | return texUnit->Combine.SourceA[3]; |
||
| 582 | } |
||
| 583 | else { |
||
| 584 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)"); |
||
| 585 | } |
||
| 586 | break; |
||
| 587 | case GL_OPERAND0_RGB: |
||
| 588 | case GL_OPERAND1_RGB: |
||
| 589 | case GL_OPERAND2_RGB: { |
||
| 590 | const unsigned op_rgb = pname - GL_OPERAND0_RGB; |
||
| 591 | return texUnit->Combine.OperandRGB[op_rgb]; |
||
| 592 | } |
||
| 593 | case GL_OPERAND3_RGB_NV: |
||
| 594 | if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.NV_texture_env_combine4) { |
||
| 595 | return texUnit->Combine.OperandRGB[3]; |
||
| 596 | } |
||
| 597 | else { |
||
| 598 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)"); |
||
| 599 | } |
||
| 600 | break; |
||
| 601 | case GL_OPERAND0_ALPHA: |
||
| 602 | case GL_OPERAND1_ALPHA: |
||
| 603 | case GL_OPERAND2_ALPHA: { |
||
| 604 | const unsigned op_alpha = pname - GL_OPERAND0_ALPHA; |
||
| 605 | return texUnit->Combine.OperandA[op_alpha]; |
||
| 606 | } |
||
| 607 | case GL_OPERAND3_ALPHA_NV: |
||
| 608 | if (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.NV_texture_env_combine4) { |
||
| 609 | return texUnit->Combine.OperandA[3]; |
||
| 610 | } |
||
| 611 | else { |
||
| 612 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)"); |
||
| 613 | } |
||
| 614 | break; |
||
| 615 | case GL_RGB_SCALE: |
||
| 616 | return 1 << texUnit->Combine.ScaleShiftRGB; |
||
| 617 | case GL_ALPHA_SCALE: |
||
| 618 | return 1 << texUnit->Combine.ScaleShiftA; |
||
| 619 | default: |
||
| 620 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)"); |
||
| 621 | break; |
||
| 622 | } |
||
| 623 | |||
| 624 | return -1; /* error */ |
||
| 625 | } |
||
| 626 | |||
| 627 | |||
| 628 | |||
| 629 | void GLAPIENTRY |
||
| 630 | _mesa_GetTexEnvfv( GLenum target, GLenum pname, GLfloat *params ) |
||
| 631 | { |
||
| 632 | GLuint maxUnit; |
||
| 633 | const struct gl_texture_unit *texUnit; |
||
| 634 | GET_CURRENT_CONTEXT(ctx); |
||
| 635 | |||
| 636 | maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
||
| 637 | ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
||
| 638 | if (ctx->Texture.CurrentUnit >= maxUnit) { |
||
| 639 | _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexEnvfv(current unit)"); |
||
| 640 | return; |
||
| 641 | } |
||
| 642 | |||
| 643 | texUnit = _mesa_get_current_tex_unit(ctx); |
||
| 644 | |||
| 645 | if (target == GL_TEXTURE_ENV) { |
||
| 646 | if (pname == GL_TEXTURE_ENV_COLOR) { |
||
| 647 | if(ctx->NewState & (_NEW_BUFFERS | _NEW_FRAG_CLAMP)) |
||
| 648 | _mesa_update_state(ctx); |
||
| 649 | if (_mesa_get_clamp_fragment_color(ctx, ctx->DrawBuffer)) |
||
| 650 | COPY_4FV( params, texUnit->EnvColor ); |
||
| 651 | else |
||
| 652 | COPY_4FV( params, texUnit->EnvColorUnclamped ); |
||
| 653 | } |
||
| 654 | else { |
||
| 655 | GLint val = get_texenvi(ctx, texUnit, pname); |
||
| 656 | if (val >= 0) { |
||
| 657 | *params = (GLfloat) val; |
||
| 658 | } |
||
| 659 | } |
||
| 660 | } |
||
| 661 | else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) { |
||
| 662 | if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
||
| 663 | *params = texUnit->LodBias; |
||
| 664 | } |
||
| 665 | else { |
||
| 666 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" ); |
||
| 667 | return; |
||
| 668 | } |
||
| 669 | } |
||
| 670 | else if (target == GL_POINT_SPRITE_NV) { |
||
| 671 | /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
||
| 672 | if (!ctx->Extensions.NV_point_sprite |
||
| 673 | && !ctx->Extensions.ARB_point_sprite) { |
||
| 674 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" ); |
||
| 675 | return; |
||
| 676 | } |
||
| 677 | if (pname == GL_COORD_REPLACE_NV) { |
||
| 678 | *params = (GLfloat) ctx->Point.CoordReplace[ctx->Texture.CurrentUnit]; |
||
| 679 | } |
||
| 680 | else { |
||
| 681 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" ); |
||
| 682 | return; |
||
| 683 | } |
||
| 684 | } |
||
| 685 | else { |
||
| 686 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" ); |
||
| 687 | return; |
||
| 688 | } |
||
| 689 | } |
||
| 690 | |||
| 691 | |||
| 692 | void GLAPIENTRY |
||
| 693 | _mesa_GetTexEnviv( GLenum target, GLenum pname, GLint *params ) |
||
| 694 | { |
||
| 695 | GLuint maxUnit; |
||
| 696 | const struct gl_texture_unit *texUnit; |
||
| 697 | GET_CURRENT_CONTEXT(ctx); |
||
| 698 | |||
| 699 | maxUnit = (target == GL_POINT_SPRITE_NV && pname == GL_COORD_REPLACE_NV) |
||
| 700 | ? ctx->Const.MaxTextureCoordUnits : ctx->Const.MaxCombinedTextureImageUnits; |
||
| 701 | if (ctx->Texture.CurrentUnit >= maxUnit) { |
||
| 702 | _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexEnviv(current unit)"); |
||
| 703 | return; |
||
| 704 | } |
||
| 705 | |||
| 706 | texUnit = _mesa_get_current_tex_unit(ctx); |
||
| 707 | |||
| 708 | if (target == GL_TEXTURE_ENV) { |
||
| 709 | if (pname == GL_TEXTURE_ENV_COLOR) { |
||
| 710 | params[0] = FLOAT_TO_INT( texUnit->EnvColor[0] ); |
||
| 711 | params[1] = FLOAT_TO_INT( texUnit->EnvColor[1] ); |
||
| 712 | params[2] = FLOAT_TO_INT( texUnit->EnvColor[2] ); |
||
| 713 | params[3] = FLOAT_TO_INT( texUnit->EnvColor[3] ); |
||
| 714 | } |
||
| 715 | else { |
||
| 716 | GLint val = get_texenvi(ctx, texUnit, pname); |
||
| 717 | if (val >= 0) { |
||
| 718 | *params = val; |
||
| 719 | } |
||
| 720 | } |
||
| 721 | } |
||
| 722 | else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) { |
||
| 723 | if (pname == GL_TEXTURE_LOD_BIAS_EXT) { |
||
| 724 | *params = (GLint) texUnit->LodBias; |
||
| 725 | } |
||
| 726 | else { |
||
| 727 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" ); |
||
| 728 | return; |
||
| 729 | } |
||
| 730 | } |
||
| 731 | else if (target == GL_POINT_SPRITE_NV) { |
||
| 732 | /* GL_ARB_point_sprite / GL_NV_point_sprite */ |
||
| 733 | if (!ctx->Extensions.NV_point_sprite |
||
| 734 | && !ctx->Extensions.ARB_point_sprite) { |
||
| 735 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" ); |
||
| 736 | return; |
||
| 737 | } |
||
| 738 | if (pname == GL_COORD_REPLACE_NV) { |
||
| 739 | *params = (GLint) ctx->Point.CoordReplace[ctx->Texture.CurrentUnit]; |
||
| 740 | } |
||
| 741 | else { |
||
| 742 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" ); |
||
| 743 | return; |
||
| 744 | } |
||
| 745 | } |
||
| 746 | else { |
||
| 747 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" ); |
||
| 748 | return; |
||
| 749 | } |
||
| 750 | } |
||
| 751 |