/* * Mesa 3-D graphics library * Version: 7.1 * * Copyright (C) 1999-2007 Brian Paul 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 texstate.c * * Texture state handling. */ #include "glheader.h" #include "colormac.h" #if FEATURE_colortable #include "colortab.h" #endif #include "context.h" #include "enums.h" #include "macros.h" #include "texcompress.h" #include "texobj.h" #include "teximage.h" #include "texstate.h" #include "texenvprogram.h" #include "mtypes.h" #include "math/m_xform.h" #define ENUM_TO_FLOAT(X) ((GLfloat)(GLint)(X)) #define ENUM_TO_DOUBLE(X) ((GLdouble)(GLint)(X)) /** * Default texture combine environment state. This is used to initialize * a context's texture units and as the basis for converting "classic" * texture environmnets to ARB_texture_env_combine style values. */ static const struct gl_tex_env_combine_state default_combine_state = { GL_MODULATE, GL_MODULATE, { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT }, { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT }, { GL_SRC_COLOR, GL_SRC_COLOR, GL_SRC_ALPHA }, { GL_SRC_ALPHA, GL_SRC_ALPHA, GL_SRC_ALPHA }, 0, 0, 2, 2 }; /** * Used by glXCopyContext to copy texture state from one context to another. */ void _mesa_copy_texture_state( const GLcontext *src, GLcontext *dst ) { GLuint i; ASSERT(src); ASSERT(dst); dst->Texture.CurrentUnit = src->Texture.CurrentUnit; dst->Texture._GenFlags = src->Texture._GenFlags; dst->Texture._TexGenEnabled = src->Texture._TexGenEnabled; dst->Texture._TexMatEnabled = src->Texture._TexMatEnabled; dst->Texture.SharedPalette = src->Texture.SharedPalette; /* per-unit state */ for (i = 0; i < src->Const.MaxTextureUnits; i++) { dst->Texture.Unit[i].Enabled = src->Texture.Unit[i].Enabled; dst->Texture.Unit[i].EnvMode = src->Texture.Unit[i].EnvMode; COPY_4V(dst->Texture.Unit[i].EnvColor, src->Texture.Unit[i].EnvColor); dst->Texture.Unit[i].TexGenEnabled = src->Texture.Unit[i].TexGenEnabled; dst->Texture.Unit[i].GenModeS = src->Texture.Unit[i].GenModeS; dst->Texture.Unit[i].GenModeT = src->Texture.Unit[i].GenModeT; dst->Texture.Unit[i].GenModeR = src->Texture.Unit[i].GenModeR; dst->Texture.Unit[i].GenModeQ = src->Texture.Unit[i].GenModeQ; dst->Texture.Unit[i]._GenBitS = src->Texture.Unit[i]._GenBitS; dst->Texture.Unit[i]._GenBitT = src->Texture.Unit[i]._GenBitT; dst->Texture.Unit[i]._GenBitR = src->Texture.Unit[i]._GenBitR; dst->Texture.Unit[i]._GenBitQ = src->Texture.Unit[i]._GenBitQ; dst->Texture.Unit[i]._GenFlags = src->Texture.Unit[i]._GenFlags; COPY_4V(dst->Texture.Unit[i].ObjectPlaneS, src->Texture.Unit[i].ObjectPlaneS); COPY_4V(dst->Texture.Unit[i].ObjectPlaneT, src->Texture.Unit[i].ObjectPlaneT); COPY_4V(dst->Texture.Unit[i].ObjectPlaneR, src->Texture.Unit[i].ObjectPlaneR); COPY_4V(dst->Texture.Unit[i].ObjectPlaneQ, src->Texture.Unit[i].ObjectPlaneQ); COPY_4V(dst->Texture.Unit[i].EyePlaneS, src->Texture.Unit[i].EyePlaneS); COPY_4V(dst->Texture.Unit[i].EyePlaneT, src->Texture.Unit[i].EyePlaneT); COPY_4V(dst->Texture.Unit[i].EyePlaneR, src->Texture.Unit[i].EyePlaneR); COPY_4V(dst->Texture.Unit[i].EyePlaneQ, src->Texture.Unit[i].EyePlaneQ); dst->Texture.Unit[i].LodBias = src->Texture.Unit[i].LodBias; /* GL_EXT_texture_env_combine */ dst->Texture.Unit[i].Combine.ModeRGB = src->Texture.Unit[i].Combine.ModeRGB; dst->Texture.Unit[i].Combine.ModeA = src->Texture.Unit[i].Combine.ModeA; COPY_3V(dst->Texture.Unit[i].Combine.SourceRGB, src->Texture.Unit[i].Combine.SourceRGB); COPY_3V(dst->Texture.Unit[i].Combine.SourceA, src->Texture.Unit[i].Combine.SourceA); COPY_3V(dst->Texture.Unit[i].Combine.OperandRGB, src->Texture.Unit[i].Combine.OperandRGB); COPY_3V(dst->Texture.Unit[i].Combine.OperandA, src->Texture.Unit[i].Combine.OperandA); dst->Texture.Unit[i].Combine.ScaleShiftRGB = src->Texture.Unit[i].Combine.ScaleShiftRGB; dst->Texture.Unit[i].Combine.ScaleShiftA = src->Texture.Unit[i].Combine.ScaleShiftA; /* copy texture object bindings, not contents of texture objects */ _mesa_lock_context_textures(dst); _mesa_reference_texobj(&dst->Texture.Unit[i].Current1D, src->Texture.Unit[i].Current1D); _mesa_reference_texobj(&dst->Texture.Unit[i].Current2D, src->Texture.Unit[i].Current2D); _mesa_reference_texobj(&dst->Texture.Unit[i].Current3D, src->Texture.Unit[i].Current3D); _mesa_reference_texobj(&dst->Texture.Unit[i].CurrentCubeMap, src->Texture.Unit[i].CurrentCubeMap); _mesa_reference_texobj(&dst->Texture.Unit[i].CurrentRect, src->Texture.Unit[i].CurrentRect); _mesa_reference_texobj(&dst->Texture.Unit[i].Current1DArray, src->Texture.Unit[i].Current1DArray); _mesa_reference_texobj(&dst->Texture.Unit[i].Current2DArray, src->Texture.Unit[i].Current2DArray); _mesa_unlock_context_textures(dst); } } /* * For debugging */ void _mesa_print_texunit_state( GLcontext *ctx, GLuint unit ) { const struct gl_texture_unit *texUnit = ctx->Texture.Unit + unit; _mesa_printf("Texture Unit %d\n", unit); _mesa_printf(" GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit->EnvMode)); _mesa_printf(" GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB)); _mesa_printf(" GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA)); _mesa_printf(" GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[0])); _mesa_printf(" GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[1])); _mesa_printf(" GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[2])); _mesa_printf(" GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[0])); _mesa_printf(" GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[1])); _mesa_printf(" GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[2])); _mesa_printf(" GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[0])); _mesa_printf(" GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[1])); _mesa_printf(" GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[2])); _mesa_printf(" GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[0])); _mesa_printf(" GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[1])); _mesa_printf(" GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[2])); _mesa_printf(" GL_RGB_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftRGB); _mesa_printf(" GL_ALPHA_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftA); _mesa_printf(" GL_TEXTURE_ENV_COLOR = (%f, %f, %f, %f)\n", texUnit->EnvColor[0], texUnit->EnvColor[1], texUnit->EnvColor[2], texUnit->EnvColor[3]); } /**********************************************************************/ /* Texture Environment */ /**********************************************************************/ /** * Convert "classic" texture environment to ARB_texture_env_combine style * environments. * * \param state texture_env_combine state vector to be filled-in. * \param mode Classic texture environment mode (i.e., \c GL_REPLACE, * \c GL_BLEND, \c GL_DECAL, etc.). * \param texBaseFormat Base format of the texture associated with the * texture unit. */ static void calculate_derived_texenv( struct gl_tex_env_combine_state *state, GLenum mode, GLenum texBaseFormat ) { GLenum mode_rgb; GLenum mode_a; *state = default_combine_state; switch (texBaseFormat) { case GL_ALPHA: state->SourceRGB[0] = GL_PREVIOUS; break; case GL_LUMINANCE_ALPHA: case GL_INTENSITY: case GL_RGBA: break; case GL_LUMINANCE: case GL_RGB: case GL_YCBCR_MESA: state->SourceA[0] = GL_PREVIOUS; break; default: _mesa_problem(NULL, "Invalid texBaseFormat in calculate_derived_texenv"); return; } if (mode == GL_REPLACE_EXT) mode = GL_REPLACE; switch (mode) { case GL_REPLACE: case GL_MODULATE: mode_rgb = (texBaseFormat == GL_ALPHA) ? GL_REPLACE : mode; mode_a = mode; break; case GL_DECAL: mode_rgb = GL_INTERPOLATE; mode_a = GL_REPLACE; state->SourceA[0] = GL_PREVIOUS; /* Having alpha / luminance / intensity textures replace using the * incoming fragment color matches the definition in NV_texture_shader. * The 1.5 spec simply marks these as "undefined". */ switch (texBaseFormat) { case GL_ALPHA: case GL_LUMINANCE: case GL_LUMINANCE_ALPHA: case GL_INTENSITY: state->SourceRGB[0] = GL_PREVIOUS; break; case GL_RGB: case GL_YCBCR_MESA: mode_rgb = GL_REPLACE; break; case GL_RGBA: state->SourceRGB[2] = GL_TEXTURE; break; } break; case GL_BLEND: mode_rgb = GL_INTERPOLATE; mode_a = GL_MODULATE; switch (texBaseFormat) { case GL_ALPHA: mode_rgb = GL_REPLACE; break; case GL_INTENSITY: mode_a = GL_INTERPOLATE; state->SourceA[0] = GL_CONSTANT; state->OperandA[2] = GL_SRC_ALPHA; /* FALLTHROUGH */ case GL_LUMINANCE: case GL_RGB: case GL_LUMINANCE_ALPHA: case GL_RGBA: case GL_YCBCR_MESA: state->SourceRGB[2] = GL_TEXTURE; state->SourceA[2] = GL_TEXTURE; state->SourceRGB[0] = GL_CONSTANT; state->OperandRGB[2] = GL_SRC_COLOR; break; } break; case GL_ADD: mode_rgb = (texBaseFormat == GL_ALPHA) ? GL_REPLACE : GL_ADD; mode_a = (texBaseFormat == GL_INTENSITY) ? GL_ADD : GL_MODULATE; break; default: _mesa_problem(NULL, "Invalid texture env mode in calculate_derived_texenv"); return; } state->ModeRGB = (state->SourceRGB[0] != GL_PREVIOUS) ? mode_rgb : GL_REPLACE; state->ModeA = (state->SourceA[0] != GL_PREVIOUS) ? mode_a : GL_REPLACE; } /**********************************************************************/ /* Texture Parameters */ /**********************************************************************/ /** * Check if a coordinate wrap mode is supported for the texture target. * \return GL_TRUE if legal, GL_FALSE otherwise */ static GLboolean validate_texture_wrap_mode(GLcontext * ctx, GLenum target, GLenum wrap) { const struct gl_extensions * const e = & ctx->Extensions; if (wrap == GL_CLAMP || wrap == GL_CLAMP_TO_EDGE || (wrap == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp)) { /* any texture target */ return GL_TRUE; } else if (target != GL_TEXTURE_RECTANGLE_NV && (wrap == GL_REPEAT || (wrap == GL_MIRRORED_REPEAT && e->ARB_texture_mirrored_repeat) || (wrap == GL_MIRROR_CLAMP_EXT && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) || (wrap == GL_MIRROR_CLAMP_TO_EDGE_EXT && (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) || (wrap == GL_MIRROR_CLAMP_TO_BORDER_EXT && (e->EXT_texture_mirror_clamp)))) { /* non-rectangle texture */ return GL_TRUE; } _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" ); return GL_FALSE; } void GLAPIENTRY _mesa_TexParameterf( GLenum target, GLenum pname, GLfloat param ) { _mesa_TexParameterfv(target, pname, ¶m); } void GLAPIENTRY _mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params ) { const GLenum eparam = (GLenum) (GLint) params[0]; struct gl_texture_unit *texUnit; struct gl_texture_object *texObj; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE)) _mesa_debug(ctx, "glTexParameter %s %s %.1f(%s)...\n", _mesa_lookup_enum_by_nr(target), _mesa_lookup_enum_by_nr(pname), *params, _mesa_lookup_enum_by_nr(eparam)); if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameterfv(current unit)"); return; } texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit]; switch (target) { case GL_TEXTURE_1D: texObj = texUnit->Current1D; break; case GL_TEXTURE_2D: texObj = texUnit->Current2D; break; case GL_TEXTURE_3D: texObj = texUnit->Current3D; break; case GL_TEXTURE_CUBE_MAP: if (!ctx->Extensions.ARB_texture_cube_map) { _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" ); return; } texObj = texUnit->CurrentCubeMap; break; case GL_TEXTURE_RECTANGLE_NV: if (!ctx->Extensions.NV_texture_rectangle) { _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" ); return; } texObj = texUnit->CurrentRect; break; case GL_TEXTURE_1D_ARRAY_EXT: if (!ctx->Extensions.MESA_texture_array) { _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" ); return; } texObj = texUnit->Current1DArray; break; case GL_TEXTURE_2D_ARRAY_EXT: if (!ctx->Extensions.MESA_texture_array) { _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" ); return; } texObj = texUnit->Current2DArray; break; default: _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" ); return; } switch (pname) { case GL_TEXTURE_MIN_FILTER: /* A small optimization */ if (texObj->MinFilter == eparam) return; if (eparam==GL_NEAREST || eparam==GL_LINEAR) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MinFilter = eparam; } else if ((eparam==GL_NEAREST_MIPMAP_NEAREST || eparam==GL_LINEAR_MIPMAP_NEAREST || eparam==GL_NEAREST_MIPMAP_LINEAR || eparam==GL_LINEAR_MIPMAP_LINEAR) && texObj->Target != GL_TEXTURE_RECTANGLE_NV) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MinFilter = eparam; } else { _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" ); return; } break; case GL_TEXTURE_MAG_FILTER: /* A small optimization */ if (texObj->MagFilter == eparam) return; if (eparam==GL_NEAREST || eparam==GL_LINEAR) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MagFilter = eparam; } else { _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" ); return; } break; case GL_TEXTURE_WRAP_S: if (texObj->WrapS == eparam) return; if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->WrapS = eparam; } else { return; } break; case GL_TEXTURE_WRAP_T: if (texObj->WrapT == eparam) return; if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->WrapT = eparam; } else { return; } break; case GL_TEXTURE_WRAP_R: if (texObj->WrapR == eparam) return; if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->WrapR = eparam; } else { return; } break; case GL_TEXTURE_BORDER_COLOR: FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->BorderColor[RCOMP] = params[0]; texObj->BorderColor[GCOMP] = params[1]; texObj->BorderColor[BCOMP] = params[2]; texObj->BorderColor[ACOMP] = params[3]; UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[RCOMP], params[0]); UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[GCOMP], params[1]); UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[BCOMP], params[2]); UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[ACOMP], params[3]); break; case GL_TEXTURE_MIN_LOD: if (texObj->MinLod == params[0]) return; FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MinLod = params[0]; break; case GL_TEXTURE_MAX_LOD: if (texObj->MaxLod == params[0]) return; FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MaxLod = params[0]; break; case GL_TEXTURE_BASE_LEVEL: if (params[0] < 0.0) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)"); return; } if (target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0.0) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)"); return; } FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->BaseLevel = (GLint) params[0]; break; case GL_TEXTURE_MAX_LEVEL: if (params[0] < 0.0) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)"); return; } if (target == GL_TEXTURE_RECTANGLE_ARB) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(param)"); return; } FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->MaxLevel = (GLint) params[0]; break; case GL_TEXTURE_PRIORITY: FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->Priority = CLAMP( params[0], 0.0F, 1.0F ); break; case GL_TEXTURE_MAX_ANISOTROPY_EXT: if (ctx->Extensions.EXT_texture_filter_anisotropic) { if (params[0] < 1.0) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" ); return; } FLUSH_VERTICES(ctx, _NEW_TEXTURE); /* clamp to max, that's what NVIDIA does */ texObj->MaxAnisotropy = MIN2(params[0], ctx->Const.MaxTextureMaxAnisotropy); } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)"); return; } break; case GL_TEXTURE_COMPARE_SGIX: if (ctx->Extensions.SGIX_shadow) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->CompareFlag = params[0] ? GL_TRUE : GL_FALSE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_TEXTURE_COMPARE_SGIX)"); return; } break; case GL_TEXTURE_COMPARE_OPERATOR_SGIX: if (ctx->Extensions.SGIX_shadow) { GLenum op = (GLenum) params[0]; if (op == GL_TEXTURE_LEQUAL_R_SGIX || op == GL_TEXTURE_GEQUAL_R_SGIX) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->CompareOperator = op; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param)"); } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_TEXTURE_COMPARE_OPERATOR_SGIX)"); return; } break; case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */ if (ctx->Extensions.SGIX_shadow_ambient) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->ShadowAmbient = CLAMP(params[0], 0.0F, 1.0F); } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_SHADOW_AMBIENT_SGIX)"); return; } break; case GL_GENERATE_MIPMAP_SGIS: if (ctx->Extensions.SGIS_generate_mipmap) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)"); return; } break; case GL_TEXTURE_COMPARE_MODE_ARB: if (ctx->Extensions.ARB_shadow) { const GLenum mode = (GLenum) params[0]; if (mode == GL_NONE || mode == GL_COMPARE_R_TO_TEXTURE_ARB) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->CompareMode = mode; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(bad GL_TEXTURE_COMPARE_MODE_ARB: 0x%x)", mode); return; } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_TEXTURE_COMPARE_MODE_ARB)"); return; } break; case GL_TEXTURE_COMPARE_FUNC_ARB: if (ctx->Extensions.ARB_shadow) { const GLenum func = (GLenum) params[0]; if (func == GL_LEQUAL || func == GL_GEQUAL) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->CompareFunc = func; } else if (ctx->Extensions.EXT_shadow_funcs && (func == GL_EQUAL || func == GL_NOTEQUAL || func == GL_LESS || func == GL_GREATER || func == GL_ALWAYS || func == GL_NEVER)) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->CompareFunc = func; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(bad GL_TEXTURE_COMPARE_FUNC_ARB)"); return; } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_TEXTURE_COMPARE_FUNC_ARB)"); return; } break; case GL_DEPTH_TEXTURE_MODE_ARB: if (ctx->Extensions.ARB_depth_texture) { const GLenum result = (GLenum) params[0]; if (result == GL_LUMINANCE || result == GL_INTENSITY || result == GL_ALPHA) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->DepthMode = result; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(bad GL_DEPTH_TEXTURE_MODE_ARB)"); return; } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=GL_DEPTH_TEXTURE_MODE_ARB)"); return; } break; case GL_TEXTURE_LOD_BIAS: /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias*/ if (ctx->Extensions.EXT_texture_lod_bias) { if (texObj->LodBias != params[0]) { FLUSH_VERTICES(ctx, _NEW_TEXTURE); texObj->LodBias = params[0]; } } break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(pname=0x%x)", pname); return; } texObj->_Complete = GL_FALSE; if (ctx->Driver.TexParameter) { (*ctx->Driver.TexParameter)( ctx, target, texObj, pname, params ); } } void GLAPIENTRY _mesa_TexParameteri( GLenum target, GLenum pname, GLint param ) { GLfloat fparam[4]; if (pname == GL_TEXTURE_PRIORITY) fparam[0] = INT_TO_FLOAT(param); else fparam[0] = (GLfloat) param; fparam[1] = fparam[2] = fparam[3] = 0.0; _mesa_TexParameterfv(target, pname, fparam); } void GLAPIENTRY _mesa_TexParameteriv( GLenum target, GLenum pname, const GLint *params ) { GLfloat fparam[4]; if (pname == GL_TEXTURE_BORDER_COLOR) { fparam[0] = INT_TO_FLOAT(params[0]); fparam[1] = INT_TO_FLOAT(params[1]); fparam[2] = INT_TO_FLOAT(params[2]); fparam[3] = INT_TO_FLOAT(params[3]); } else { if (pname == GL_TEXTURE_PRIORITY) fparam[0] = INT_TO_FLOAT(params[0]); else fparam[0] = (GLfloat) params[0]; fparam[1] = fparam[2] = fparam[3] = 0.0F; } _mesa_TexParameterfv(target, pname, fparam); } void GLAPIENTRY _mesa_GetTexLevelParameterfv( GLenum target, GLint level, GLenum pname, GLfloat *params ) { GLint iparam; _mesa_GetTexLevelParameteriv( target, level, pname, &iparam ); *params = (GLfloat) iparam; } static GLuint tex_image_dimensions(GLcontext *ctx, GLenum target) { switch (target) { case GL_TEXTURE_1D: case GL_PROXY_TEXTURE_1D: return 1; case GL_TEXTURE_2D: case GL_PROXY_TEXTURE_2D: return 2; case GL_TEXTURE_3D: case GL_PROXY_TEXTURE_3D: return 3; case GL_TEXTURE_CUBE_MAP: case GL_PROXY_TEXTURE_CUBE_MAP: case GL_TEXTURE_CUBE_MAP_POSITIVE_X: case GL_TEXTURE_CUBE_MAP_NEGATIVE_X: case GL_TEXTURE_CUBE_MAP_POSITIVE_Y: case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y: case GL_TEXTURE_CUBE_MAP_POSITIVE_Z: case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z: return ctx->Extensions.ARB_texture_cube_map ? 2 : 0; case GL_TEXTURE_RECTANGLE_NV: case GL_PROXY_TEXTURE_RECTANGLE_NV: return ctx->Extensions.NV_texture_rectangle ? 2 : 0; case GL_TEXTURE_1D_ARRAY_EXT: case GL_PROXY_TEXTURE_1D_ARRAY_EXT: return ctx->Extensions.MESA_texture_array ? 2 : 0; case GL_TEXTURE_2D_ARRAY_EXT: case GL_PROXY_TEXTURE_2D_ARRAY_EXT: return ctx->Extensions.MESA_texture_array ? 3 : 0; default: _mesa_problem(ctx, "bad target in _mesa_tex_target_dimensions()"); return 0; } } void GLAPIENTRY _mesa_GetTexLevelParameteriv( GLenum target, GLint level, GLenum pname, GLint *params ) { const struct gl_texture_unit *texUnit; struct gl_texture_object *texObj; const struct gl_texture_image *img = NULL; GLuint dimensions; GLboolean isProxy; GLint maxLevels; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexLevelParameteriv(current unit)"); return; } texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit]; /* this will catch bad target values */ dimensions = tex_image_dimensions(ctx, target); /* 1, 2 or 3 */ if (dimensions == 0) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(target)"); return; } maxLevels = _mesa_max_texture_levels(ctx, target); if (maxLevels == 0) { /* should not happen since was just checked above */ _mesa_problem(ctx, "maxLevels=0 in _mesa_GetTexLevelParameter"); return; } if (level < 0 || level >= maxLevels) { _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" ); return; } texObj = _mesa_select_tex_object(ctx, texUnit, target); _mesa_lock_texture(ctx, texObj); img = _mesa_select_tex_image(ctx, texObj, target, level); if (!img || !img->TexFormat) { /* undefined texture image */ if (pname == GL_TEXTURE_COMPONENTS) *params = 1; else *params = 0; goto out; } isProxy = _mesa_is_proxy_texture(target); switch (pname) { case GL_TEXTURE_WIDTH: *params = img->Width; break; case GL_TEXTURE_HEIGHT: *params = img->Height; break; case GL_TEXTURE_DEPTH: *params = img->Depth; break; case GL_TEXTURE_INTERNAL_FORMAT: *params = img->InternalFormat; break; case GL_TEXTURE_BORDER: *params = img->Border; break; case GL_TEXTURE_RED_SIZE: if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA) *params = img->TexFormat->RedBits; else *params = 0; break; case GL_TEXTURE_GREEN_SIZE: if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA) *params = img->TexFormat->GreenBits; else *params = 0; break; case GL_TEXTURE_BLUE_SIZE: if (img->_BaseFormat == GL_RGB || img->_BaseFormat == GL_RGBA) *params = img->TexFormat->BlueBits; else *params = 0; break; case GL_TEXTURE_ALPHA_SIZE: if (img->_BaseFormat == GL_ALPHA || img->_BaseFormat == GL_LUMINANCE_ALPHA || img->_BaseFormat == GL_RGBA) *params = img->TexFormat->AlphaBits; else *params = 0; break; case GL_TEXTURE_INTENSITY_SIZE: if (img->_BaseFormat != GL_INTENSITY) *params = 0; else if (img->TexFormat->IntensityBits > 0) *params = img->TexFormat->IntensityBits; else /* intensity probably stored as rgb texture */ *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits); break; case GL_TEXTURE_LUMINANCE_SIZE: if (img->_BaseFormat != GL_LUMINANCE && img->_BaseFormat != GL_LUMINANCE_ALPHA) *params = 0; else if (img->TexFormat->LuminanceBits > 0) *params = img->TexFormat->LuminanceBits; else /* luminance probably stored as rgb texture */ *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits); break; case GL_TEXTURE_INDEX_SIZE_EXT: if (img->_BaseFormat == GL_COLOR_INDEX) *params = img->TexFormat->IndexBits; else *params = 0; break; case GL_TEXTURE_DEPTH_SIZE_ARB: if (ctx->Extensions.SGIX_depth_texture || ctx->Extensions.ARB_depth_texture) *params = img->TexFormat->DepthBits; else _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); break; case GL_TEXTURE_STENCIL_SIZE_EXT: if (ctx->Extensions.EXT_packed_depth_stencil) { *params = img->TexFormat->StencilBits; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; /* GL_ARB_texture_compression */ case GL_TEXTURE_COMPRESSED_IMAGE_SIZE: if (ctx->Extensions.ARB_texture_compression) { if (img->IsCompressed && !isProxy) { /* Don't use ctx->Driver.CompressedTextureSize() since that * may returned a padded hardware size. */ *params = _mesa_compressed_texture_size(ctx, img->Width, img->Height, img->Depth, img->TexFormat->MesaFormat); } else { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexLevelParameter[if]v(pname)"); } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_COMPRESSED: if (ctx->Extensions.ARB_texture_compression) { *params = (GLint) img->IsCompressed; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; /* GL_ARB_texture_float */ case GL_TEXTURE_RED_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->RedBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_GREEN_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->GreenBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_BLUE_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->BlueBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_ALPHA_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->AlphaBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_LUMINANCE_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->LuminanceBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_INTENSITY_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->IntensityBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; case GL_TEXTURE_DEPTH_TYPE_ARB: if (ctx->Extensions.ARB_texture_float) { *params = img->TexFormat->DepthBits ? img->TexFormat->DataType : GL_NONE; } else { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(pname)"); } out: _mesa_unlock_texture(ctx, texObj); } void GLAPIENTRY _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params ) { struct gl_texture_unit *texUnit; struct gl_texture_object *obj; GLboolean error = GL_FALSE; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexParameterfv(current unit)"); return; } texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit]; obj = _mesa_select_tex_object(ctx, texUnit, target); if (!obj) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(target)"); return; } _mesa_lock_texture(ctx, obj); switch (pname) { case GL_TEXTURE_MAG_FILTER: *params = ENUM_TO_FLOAT(obj->MagFilter); break; case GL_TEXTURE_MIN_FILTER: *params = ENUM_TO_FLOAT(obj->MinFilter); break; case GL_TEXTURE_WRAP_S: *params = ENUM_TO_FLOAT(obj->WrapS); break; case GL_TEXTURE_WRAP_T: *params = ENUM_TO_FLOAT(obj->WrapT); break; case GL_TEXTURE_WRAP_R: *params = ENUM_TO_FLOAT(obj->WrapR); break; case GL_TEXTURE_BORDER_COLOR: params[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F); params[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F); params[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F); params[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F); break; case GL_TEXTURE_RESIDENT: { GLboolean resident; if (ctx->Driver.IsTextureResident) resident = ctx->Driver.IsTextureResident(ctx, obj); else resident = GL_TRUE; *params = ENUM_TO_FLOAT(resident); } break; case GL_TEXTURE_PRIORITY: *params = obj->Priority; break; case GL_TEXTURE_MIN_LOD: *params = obj->MinLod; break; case GL_TEXTURE_MAX_LOD: *params = obj->MaxLod; break; case GL_TEXTURE_BASE_LEVEL: *params = (GLfloat) obj->BaseLevel; break; case GL_TEXTURE_MAX_LEVEL: *params = (GLfloat) obj->MaxLevel; break; case GL_TEXTURE_MAX_ANISOTROPY_EXT: if (ctx->Extensions.EXT_texture_filter_anisotropic) { *params = obj->MaxAnisotropy; } else error = 1; break; case GL_TEXTURE_COMPARE_SGIX: if (ctx->Extensions.SGIX_shadow) { *params = (GLfloat) obj->CompareFlag; } else error = 1; break; case GL_TEXTURE_COMPARE_OPERATOR_SGIX: if (ctx->Extensions.SGIX_shadow) { *params = (GLfloat) obj->CompareOperator; } else error = 1; break; case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */ if (ctx->Extensions.SGIX_shadow_ambient) { *params = obj->ShadowAmbient; } else error = 1; break; case GL_GENERATE_MIPMAP_SGIS: if (ctx->Extensions.SGIS_generate_mipmap) { *params = (GLfloat) obj->GenerateMipmap; } else error = 1; break; case GL_TEXTURE_COMPARE_MODE_ARB: if (ctx->Extensions.ARB_shadow) { *params = (GLfloat) obj->CompareMode; } else error = 1; break; case GL_TEXTURE_COMPARE_FUNC_ARB: if (ctx->Extensions.ARB_shadow) { *params = (GLfloat) obj->CompareFunc; } else error = 1; break; case GL_DEPTH_TEXTURE_MODE_ARB: if (ctx->Extensions.ARB_depth_texture) { *params = (GLfloat) obj->DepthMode; } else error = 1; break; case GL_TEXTURE_LOD_BIAS: if (ctx->Extensions.EXT_texture_lod_bias) { *params = obj->LodBias; } else error = 1; break; default: error = 1; break; } if (error) _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)", pname); _mesa_unlock_texture(ctx, obj); } void GLAPIENTRY _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params ) { struct gl_texture_unit *texUnit; struct gl_texture_object *obj; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexParameteriv(current unit)"); return; } texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit]; obj = _mesa_select_tex_object(ctx, texUnit, target); if (!obj) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(target)"); return; } switch (pname) { case GL_TEXTURE_MAG_FILTER: *params = (GLint) obj->MagFilter; return; case GL_TEXTURE_MIN_FILTER: *params = (GLint) obj->MinFilter; return; case GL_TEXTURE_WRAP_S: *params = (GLint) obj->WrapS; return; case GL_TEXTURE_WRAP_T: *params = (GLint) obj->WrapT; return; case GL_TEXTURE_WRAP_R: *params = (GLint) obj->WrapR; return; case GL_TEXTURE_BORDER_COLOR: { GLfloat b[4]; b[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F); b[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F); b[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F); b[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F); params[0] = FLOAT_TO_INT(b[0]); params[1] = FLOAT_TO_INT(b[1]); params[2] = FLOAT_TO_INT(b[2]); params[3] = FLOAT_TO_INT(b[3]); } return; case GL_TEXTURE_RESIDENT: { GLboolean resident; if (ctx->Driver.IsTextureResident) resident = ctx->Driver.IsTextureResident(ctx, obj); else resident = GL_TRUE; *params = (GLint) resident; } return; case GL_TEXTURE_PRIORITY: *params = FLOAT_TO_INT(obj->Priority); return; case GL_TEXTURE_MIN_LOD: *params = (GLint) obj->MinLod; return; case GL_TEXTURE_MAX_LOD: *params = (GLint) obj->MaxLod; return; case GL_TEXTURE_BASE_LEVEL: *params = obj->BaseLevel; return; case GL_TEXTURE_MAX_LEVEL: *params = obj->MaxLevel; return; case GL_TEXTURE_MAX_ANISOTROPY_EXT: if (ctx->Extensions.EXT_texture_filter_anisotropic) { *params = (GLint) obj->MaxAnisotropy; return; } break; case GL_TEXTURE_COMPARE_SGIX: if (ctx->Extensions.SGIX_shadow) { *params = (GLint) obj->CompareFlag; return; } break; case GL_TEXTURE_COMPARE_OPERATOR_SGIX: if (ctx->Extensions.SGIX_shadow) { *params = (GLint) obj->CompareOperator; return; } break; case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */ if (ctx->Extensions.SGIX_shadow_ambient) { *params = (GLint) FLOAT_TO_INT(obj->ShadowAmbient); return; } break; case GL_GENERATE_MIPMAP_SGIS: if (ctx->Extensions.SGIS_generate_mipmap) { *params = (GLint) obj->GenerateMipmap; return; } break; case GL_TEXTURE_COMPARE_MODE_ARB: if (ctx->Extensions.ARB_shadow) { *params = (GLint) obj->CompareMode; return; } break; case GL_TEXTURE_COMPARE_FUNC_ARB: if (ctx->Extensions.ARB_shadow) { *params = (GLint) obj->CompareFunc; return; } break; case GL_DEPTH_TEXTURE_MODE_ARB: if (ctx->Extensions.ARB_depth_texture) { *params = (GLint) obj->DepthMode; return; } break; case GL_TEXTURE_LOD_BIAS: if (ctx->Extensions.EXT_texture_lod_bias) { *params = (GLint) obj->LodBias; return; } break; default: ; /* silence warnings */ } /* If we get here, pname was an unrecognized enum */ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname); } /* GL_ARB_multitexture */ void GLAPIENTRY _mesa_ActiveTextureARB(GLenum texture) { GET_CURRENT_CONTEXT(ctx); const GLuint texUnit = texture - GL_TEXTURE0; ASSERT_OUTSIDE_BEGIN_END(ctx); if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) _mesa_debug(ctx, "glActiveTexture %s\n", _mesa_lookup_enum_by_nr(texture)); /* XXX error-check against max(coordunits, imageunits) */ if (texUnit >= ctx->Const.MaxTextureUnits) { _mesa_error(ctx, GL_INVALID_ENUM, "glActiveTexture(texture)"); return; } if (ctx->Texture.CurrentUnit == texUnit) return; FLUSH_VERTICES(ctx, _NEW_TEXTURE); ctx->Texture.CurrentUnit = texUnit; if (ctx->Transform.MatrixMode == GL_TEXTURE) { /* update current stack pointer */ ctx->CurrentStack = &ctx->TextureMatrixStack[texUnit]; } if (ctx->Driver.ActiveTexture) { (*ctx->Driver.ActiveTexture)( ctx, (GLuint) texUnit ); } } /* GL_ARB_multitexture */ void GLAPIENTRY _mesa_ClientActiveTextureARB(GLenum texture) { GET_CURRENT_CONTEXT(ctx); GLuint texUnit = texture - GL_TEXTURE0; ASSERT_OUTSIDE_BEGIN_END(ctx); if (texUnit >= ctx->Const.MaxTextureCoordUnits) { _mesa_error(ctx, GL_INVALID_ENUM, "glClientActiveTexture(texture)"); return; } FLUSH_VERTICES(ctx, _NEW_ARRAY); ctx->Array.ActiveTexture = texUnit; } /**********************************************************************/ /***** State management *****/ /**********************************************************************/ /** * \note This routine refers to derived texture attribute values to * compute the ENABLE_TEXMAT flags, but is only called on * _NEW_TEXTURE_MATRIX. On changes to _NEW_TEXTURE, the ENABLE_TEXMAT * flags are updated by _mesa_update_textures(), below. * * \param ctx GL context. */ static void update_texture_matrices( GLcontext *ctx ) { GLuint i; ctx->Texture._TexMatEnabled = 0; for (i=0; i < ctx->Const.MaxTextureUnits; i++) { if (_math_matrix_is_dirty(ctx->TextureMatrixStack[i].Top)) { _math_matrix_analyse( ctx->TextureMatrixStack[i].Top ); if (ctx->Texture.Unit[i]._ReallyEnabled && ctx->TextureMatrixStack[i].Top->type != MATRIX_IDENTITY) ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i); if (ctx->Driver.TextureMatrix) ctx->Driver.TextureMatrix( ctx, i, ctx->TextureMatrixStack[i].Top); } } } /** * Update texture object's _Function field. We need to do this * whenever any of the texture object's shadow-related fields change * or when we start/stop using a fragment program. * * This function could be expanded someday to update additional per-object * fields that depend on assorted state changes. */ static void update_texture_compare_function(GLcontext *ctx, struct gl_texture_object *tObj) { /* XXX temporarily disable this test since it breaks the GLSL * shadow2D(), etc. functions. */ if (0 /*ctx->FragmentProgram._Current*/) { /* Texel/coordinate comparison is ignored for programs. * See GL_ARB_fragment_program/shader spec for details. */ tObj->_Function = GL_NONE; } else if (tObj->CompareFlag) { /* GL_SGIX_shadow */ if (tObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) { tObj->_Function = GL_LEQUAL; } else { ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX); tObj->_Function = GL_GEQUAL; } } else if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) { /* GL_ARB_shadow */ tObj->_Function = tObj->CompareFunc; } else { tObj->_Function = GL_NONE; /* pass depth through as grayscale */ } } /** * Helper function for determining which texture object (1D, 2D, cube, etc) * should actually be used. */ static void texture_override(GLcontext *ctx, struct gl_texture_unit *texUnit, GLbitfield enableBits, struct gl_texture_object *texObj, GLuint textureBit) { if (!texUnit->_ReallyEnabled && (enableBits & textureBit)) { if (!texObj->_Complete) { _mesa_test_texobj_completeness(ctx, texObj); } if (texObj->_Complete) { texUnit->_ReallyEnabled = textureBit; texUnit->_Current = texObj; update_texture_compare_function(ctx, texObj); } } } /** * \note This routine refers to derived texture matrix values to * compute the ENABLE_TEXMAT flags, but is only called on * _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT * flags are updated by _mesa_update_texture_matrices, above. * * \param ctx GL context. */ static void update_texture_state( GLcontext *ctx ) { GLuint unit; struct gl_fragment_program *fprog = NULL; struct gl_vertex_program *vprog = NULL; if (ctx->Shader.CurrentProgram && ctx->Shader.CurrentProgram->LinkStatus) { fprog = ctx->Shader.CurrentProgram->FragmentProgram; vprog = ctx->Shader.CurrentProgram->VertexProgram; } else { if (ctx->FragmentProgram._Enabled) { fprog = ctx->FragmentProgram.Current; } if (ctx->VertexProgram._Enabled) { /* XXX enable this if/when non-shader vertex programs get * texture fetches: vprog = ctx->VertexProgram.Current; */ } } ctx->NewState |= _NEW_TEXTURE; /* TODO: only set this if there are * actual changes. */ ctx->Texture._EnabledUnits = 0; ctx->Texture._GenFlags = 0; ctx->Texture._TexMatEnabled = 0; ctx->Texture._TexGenEnabled = 0; /* * Update texture unit state. */ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; GLbitfield enableBits; texUnit->_Current = NULL; texUnit->_ReallyEnabled = 0; texUnit->_GenFlags = 0; /* Get the bitmask of texture enables. * enableBits will be a mask of the TEXTURE_*_BIT flags indicating * which texture targets are enabled (fixed function) or referenced * by a fragment shader/program. When multiple flags are set, we'll * settle on the one with highest priority (see texture_override below). */ if (fprog || vprog) { enableBits = 0x0; if (fprog) enableBits |= fprog->Base.TexturesUsed[unit]; if (vprog) enableBits |= vprog->Base.TexturesUsed[unit]; } else { if (!texUnit->Enabled) continue; enableBits = texUnit->Enabled; } /* Look for the highest-priority texture target that's enabled and * complete. That's the one we'll use for texturing. If we're using * a fragment program we're guaranteed that bitcount(enabledBits) <= 1. */ texture_override(ctx, texUnit, enableBits, texUnit->Current2DArray, TEXTURE_2D_ARRAY_BIT); texture_override(ctx, texUnit, enableBits, texUnit->Current1DArray, TEXTURE_1D_ARRAY_BIT); texture_override(ctx, texUnit, enableBits, texUnit->CurrentCubeMap, TEXTURE_CUBE_BIT); texture_override(ctx, texUnit, enableBits, texUnit->Current3D, TEXTURE_3D_BIT); texture_override(ctx, texUnit, enableBits, texUnit->CurrentRect, TEXTURE_RECT_BIT); texture_override(ctx, texUnit, enableBits, texUnit->Current2D, TEXTURE_2D_BIT); texture_override(ctx, texUnit, enableBits, texUnit->Current1D, TEXTURE_1D_BIT); if (!texUnit->_ReallyEnabled) { continue; } if (texUnit->_ReallyEnabled) ctx->Texture._EnabledUnits |= (1 << unit); if (texUnit->EnvMode == GL_COMBINE) { texUnit->_CurrentCombine = & texUnit->Combine; } else { const struct gl_texture_object *texObj = texUnit->_Current; GLenum format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat; if (format == GL_COLOR_INDEX) { format = GL_RGBA; /* a bit of a hack */ } else if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) { format = texObj->DepthMode; } calculate_derived_texenv(&texUnit->_EnvMode, texUnit->EnvMode, format); texUnit->_CurrentCombine = & texUnit->_EnvMode; } switch (texUnit->_CurrentCombine->ModeRGB) { case GL_REPLACE: texUnit->_CurrentCombine->_NumArgsRGB = 1; break; case GL_MODULATE: case GL_ADD: case GL_ADD_SIGNED: case GL_SUBTRACT: case GL_DOT3_RGB: case GL_DOT3_RGBA: case GL_DOT3_RGB_EXT: case GL_DOT3_RGBA_EXT: texUnit->_CurrentCombine->_NumArgsRGB = 2; break; case GL_INTERPOLATE: case GL_MODULATE_ADD_ATI: case GL_MODULATE_SIGNED_ADD_ATI: case GL_MODULATE_SUBTRACT_ATI: texUnit->_CurrentCombine->_NumArgsRGB = 3; break; default: texUnit->_CurrentCombine->_NumArgsRGB = 0; _mesa_problem(ctx, "invalid RGB combine mode in update_texture_state"); return; } switch (texUnit->_CurrentCombine->ModeA) { case GL_REPLACE: texUnit->_CurrentCombine->_NumArgsA = 1; break; case GL_MODULATE: case GL_ADD: case GL_ADD_SIGNED: case GL_SUBTRACT: texUnit->_CurrentCombine->_NumArgsA = 2; break; case GL_INTERPOLATE: case GL_MODULATE_ADD_ATI: case GL_MODULATE_SIGNED_ADD_ATI: case GL_MODULATE_SUBTRACT_ATI: texUnit->_CurrentCombine->_NumArgsA = 3; break; default: texUnit->_CurrentCombine->_NumArgsA = 0; _mesa_problem(ctx, "invalid Alpha combine mode in update_texture_state"); break; } } /* Determine which texture coordinate sets are actually needed */ if (fprog) { const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1; ctx->Texture._EnabledCoordUnits = (fprog->Base.InputsRead >> FRAG_ATTRIB_TEX0) & coordMask; } else { ctx->Texture._EnabledCoordUnits = ctx->Texture._EnabledUnits; } /* Setup texgen for those texture coordinate sets that are in use */ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; if (!(ctx->Texture._EnabledCoordUnits & (1 << unit))) continue; if (texUnit->TexGenEnabled) { if (texUnit->TexGenEnabled & S_BIT) { texUnit->_GenFlags |= texUnit->_GenBitS; } if (texUnit->TexGenEnabled & T_BIT) { texUnit->_GenFlags |= texUnit->_GenBitT; } if (texUnit->TexGenEnabled & Q_BIT) { texUnit->_GenFlags |= texUnit->_GenBitQ; } if (texUnit->TexGenEnabled & R_BIT) { texUnit->_GenFlags |= texUnit->_GenBitR; } ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(unit); ctx->Texture._GenFlags |= texUnit->_GenFlags; } if (ctx->TextureMatrixStack[unit].Top->type != MATRIX_IDENTITY) ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(unit); } } /** * Update texture-related derived state. */ void _mesa_update_texture( GLcontext *ctx, GLuint new_state ) { if (new_state & _NEW_TEXTURE_MATRIX) update_texture_matrices( ctx ); if (new_state & (_NEW_TEXTURE | _NEW_PROGRAM)) update_texture_state( ctx ); } /**********************************************************************/ /***** Initialization *****/ /**********************************************************************/ /** * Allocate the proxy textures for the given context. * * \param ctx the context to allocate proxies for. * * \return GL_TRUE on success, or GL_FALSE on failure * * If run out of memory part way through the allocations, clean up and return * GL_FALSE. */ static GLboolean alloc_proxy_textures( GLcontext *ctx ) { static const GLenum targets[] = { GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_1D_ARRAY_EXT, GL_TEXTURE_2D_ARRAY_EXT }; GLint tgt; ASSERT(Elements(targets) == NUM_TEXTURE_TARGETS); for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) { if (!(ctx->Texture.ProxyTex[tgt] = ctx->Driver.NewTextureObject(ctx, 0, targets[tgt]))) { /* out of memory, free what we did allocate */ while (--tgt >= 0) { ctx->Driver.DeleteTexture(ctx, ctx->Texture.ProxyTex[tgt]); } return GL_FALSE; } } assert(ctx->Texture.ProxyTex[0]->RefCount == 1); /* sanity check */ return GL_TRUE; } /** * Initialize a texture unit. * * \param ctx GL context. * \param unit texture unit number to be initialized. */ static void init_texture_unit( GLcontext *ctx, GLuint unit ) { struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; texUnit->EnvMode = GL_MODULATE; ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 ); texUnit->Combine = default_combine_state; texUnit->_EnvMode = default_combine_state; texUnit->_CurrentCombine = & texUnit->_EnvMode; texUnit->TexGenEnabled = 0; texUnit->GenModeS = GL_EYE_LINEAR; texUnit->GenModeT = GL_EYE_LINEAR; texUnit->GenModeR = GL_EYE_LINEAR; texUnit->GenModeQ = GL_EYE_LINEAR; texUnit->_GenBitS = TEXGEN_EYE_LINEAR; texUnit->_GenBitT = TEXGEN_EYE_LINEAR; texUnit->_GenBitR = TEXGEN_EYE_LINEAR; texUnit->_GenBitQ = TEXGEN_EYE_LINEAR; /* Yes, these plane coefficients are correct! */ ASSIGN_4V( texUnit->ObjectPlaneS, 1.0, 0.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->ObjectPlaneT, 0.0, 1.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->ObjectPlaneR, 0.0, 0.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->ObjectPlaneQ, 0.0, 0.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->EyePlaneS, 1.0, 0.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->EyePlaneT, 0.0, 1.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 ); ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 ); /* initialize current texture object ptrs to the shared default objects */ _mesa_reference_texobj(&texUnit->Current1D, ctx->Shared->Default1D); _mesa_reference_texobj(&texUnit->Current2D, ctx->Shared->Default2D); _mesa_reference_texobj(&texUnit->Current3D, ctx->Shared->Default3D); _mesa_reference_texobj(&texUnit->CurrentCubeMap, ctx->Shared->DefaultCubeMap); _mesa_reference_texobj(&texUnit->CurrentRect, ctx->Shared->DefaultRect); _mesa_reference_texobj(&texUnit->Current1DArray, ctx->Shared->Default1DArray); _mesa_reference_texobj(&texUnit->Current2DArray, ctx->Shared->Default2DArray); } /** * Initialize texture state for the given context. */ GLboolean _mesa_init_texture(GLcontext *ctx) { GLuint i; assert(MAX_TEXTURE_LEVELS >= MAX_3D_TEXTURE_LEVELS); assert(MAX_TEXTURE_LEVELS >= MAX_CUBE_TEXTURE_LEVELS); /* Texture group */ ctx->Texture.CurrentUnit = 0; /* multitexture */ ctx->Texture._EnabledUnits = 0; ctx->Texture.SharedPalette = GL_FALSE; #if FEATURE_colortable _mesa_init_colortable(&ctx->Texture.Palette); #endif for (i = 0; i < MAX_TEXTURE_UNITS; i++) init_texture_unit( ctx, i ); /* After we're done initializing the context's texture state the default * texture objects' refcounts should be at least MAX_TEXTURE_UNITS + 1. */ assert(ctx->Shared->Default1D->RefCount >= MAX_TEXTURE_UNITS + 1); /* Allocate proxy textures */ if (!alloc_proxy_textures( ctx )) return GL_FALSE; return GL_TRUE; } /** * Free dynamically-allocted texture data attached to the given context. */ void _mesa_free_texture_data(GLcontext *ctx) { GLuint u, tgt; /* unreference current textures */ for (u = 0; u < MAX_TEXTURE_IMAGE_UNITS; u++) { struct gl_texture_unit *unit = ctx->Texture.Unit + u; _mesa_reference_texobj(&unit->Current1D, NULL); _mesa_reference_texobj(&unit->Current2D, NULL); _mesa_reference_texobj(&unit->Current3D, NULL); _mesa_reference_texobj(&unit->CurrentCubeMap, NULL); _mesa_reference_texobj(&unit->CurrentRect, NULL); _mesa_reference_texobj(&unit->Current1DArray, NULL); _mesa_reference_texobj(&unit->Current2DArray, NULL); } /* Free proxy texture objects */ for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) ctx->Driver.DeleteTexture(ctx, ctx->Texture.ProxyTex[tgt]); #if FEATURE_colortable { GLuint i; for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) _mesa_free_colortable_data( &ctx->Texture.Unit[i].ColorTable ); } #endif } /** * Update the default texture objects in the given context to reference those * specified in the shared state and release those referencing the old * shared state. */ void _mesa_update_default_objects_texture(GLcontext *ctx) { GLuint i; for (i = 0; i < MAX_TEXTURE_UNITS; i++) { struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i]; _mesa_reference_texobj(&texUnit->Current1D, ctx->Shared->Default1D); _mesa_reference_texobj(&texUnit->Current2D, ctx->Shared->Default2D); _mesa_reference_texobj(&texUnit->Current3D, ctx->Shared->Default3D); _mesa_reference_texobj(&texUnit->CurrentCubeMap, ctx->Shared->DefaultCubeMap); _mesa_reference_texobj(&texUnit->CurrentRect, ctx->Shared->DefaultRect); _mesa_reference_texobj(&texUnit->Current1DArray, ctx->Shared->Default1DArray); _mesa_reference_texobj(&texUnit->Current2DArray, ctx->Shared->Default2DArray); } }