| /* |
| * Mesa 3-D graphics library |
| * Version: 7.5 |
| * |
| * 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 "mfeatures.h" |
| #include "bufferobj.h" |
| #include "colormac.h" |
| #include "colortab.h" |
| #include "context.h" |
| #include "enums.h" |
| #include "macros.h" |
| #include "texobj.h" |
| #include "teximage.h" |
| #include "texstate.h" |
| #include "mtypes.h" |
| |
| |
| |
| /** |
| * 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_CONSTANT }, |
| { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT, GL_CONSTANT }, |
| { GL_SRC_COLOR, GL_SRC_COLOR, GL_SRC_ALPHA, GL_SRC_ALPHA }, |
| { 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 struct gl_context *src, struct gl_context *dst ) |
| { |
| GLuint u, tex; |
| |
| 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; |
| |
| /* per-unit state */ |
| for (u = 0; u < src->Const.MaxCombinedTextureImageUnits; u++) { |
| dst->Texture.Unit[u].Enabled = src->Texture.Unit[u].Enabled; |
| dst->Texture.Unit[u].EnvMode = src->Texture.Unit[u].EnvMode; |
| COPY_4V(dst->Texture.Unit[u].EnvColor, src->Texture.Unit[u].EnvColor); |
| dst->Texture.Unit[u].TexGenEnabled = src->Texture.Unit[u].TexGenEnabled; |
| dst->Texture.Unit[u].GenS = src->Texture.Unit[u].GenS; |
| dst->Texture.Unit[u].GenT = src->Texture.Unit[u].GenT; |
| dst->Texture.Unit[u].GenR = src->Texture.Unit[u].GenR; |
| dst->Texture.Unit[u].GenQ = src->Texture.Unit[u].GenQ; |
| dst->Texture.Unit[u].LodBias = src->Texture.Unit[u].LodBias; |
| |
| /* GL_EXT_texture_env_combine */ |
| dst->Texture.Unit[u].Combine = src->Texture.Unit[u].Combine; |
| |
| /* GL_ATI_envmap_bumpmap - need this? */ |
| dst->Texture.Unit[u].BumpTarget = src->Texture.Unit[u].BumpTarget; |
| COPY_4V(dst->Texture.Unit[u].RotMatrix, src->Texture.Unit[u].RotMatrix); |
| |
| /* |
| * XXX strictly speaking, we should compare texture names/ids and |
| * bind textures in the dest context according to id. For now, only |
| * copy bindings if the contexts share the same pool of textures to |
| * avoid refcounting bugs. |
| */ |
| if (dst->Shared == src->Shared) { |
| /* copy texture object bindings, not contents of texture objects */ |
| _mesa_lock_context_textures(dst); |
| |
| for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) { |
| _mesa_reference_texobj(&dst->Texture.Unit[u].CurrentTex[tex], |
| src->Texture.Unit[u].CurrentTex[tex]); |
| } |
| _mesa_unlock_context_textures(dst); |
| } |
| } |
| } |
| |
| |
| /* |
| * For debugging |
| */ |
| void |
| _mesa_print_texunit_state( struct gl_context *ctx, GLuint unit ) |
| { |
| const struct gl_texture_unit *texUnit = ctx->Texture.Unit + unit; |
| printf("Texture Unit %d\n", unit); |
| printf(" GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit->EnvMode)); |
| printf(" GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB)); |
| printf(" GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA)); |
| printf(" GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[0])); |
| printf(" GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[1])); |
| printf(" GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[2])); |
| printf(" GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[0])); |
| printf(" GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[1])); |
| printf(" GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[2])); |
| printf(" GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[0])); |
| printf(" GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[1])); |
| printf(" GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[2])); |
| printf(" GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[0])); |
| printf(" GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[1])); |
| printf(" GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[2])); |
| printf(" GL_RGB_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftRGB); |
| printf(" GL_ALPHA_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftA); |
| 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_RED: |
| case GL_RG: |
| case GL_RGB: |
| case GL_YCBCR_MESA: |
| case GL_DUDV_ATI: |
| state->SourceA[0] = GL_PREVIOUS; |
| break; |
| |
| default: |
| _mesa_problem(NULL, |
| "Invalid texBaseFormat 0x%x in calculate_derived_texenv", |
| texBaseFormat); |
| 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_RED: |
| case GL_RG: |
| case GL_RGB: |
| case GL_YCBCR_MESA: |
| case GL_DUDV_ATI: |
| 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_RED: |
| case GL_RG: |
| case GL_RGB: |
| case GL_LUMINANCE_ALPHA: |
| case GL_RGBA: |
| case GL_YCBCR_MESA: |
| case GL_DUDV_ATI: |
| 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 0x%x in calculate_derived_texenv", |
| mode); |
| return; |
| } |
| |
| state->ModeRGB = (state->SourceRGB[0] != GL_PREVIOUS) |
| ? mode_rgb : GL_REPLACE; |
| state->ModeA = (state->SourceA[0] != GL_PREVIOUS) |
| ? mode_a : GL_REPLACE; |
| } |
| |
| |
| |
| |
| /* GL_ARB_multitexture */ |
| void GLAPIENTRY |
| _mesa_ActiveTextureARB(GLenum texture) |
| { |
| const GLuint texUnit = texture - GL_TEXTURE0; |
| GLuint k; |
| GET_CURRENT_CONTEXT(ctx); |
| |
| /* See OpenGL spec for glActiveTexture: */ |
| k = MAX2(ctx->Const.MaxCombinedTextureImageUnits, |
| ctx->Const.MaxTextureCoordUnits); |
| |
| ASSERT(k <= Elements(ctx->Texture.Unit)); |
| |
| ASSERT_OUTSIDE_BEGIN_END(ctx); |
| |
| if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) |
| _mesa_debug(ctx, "glActiveTexture %s\n", |
| _mesa_lookup_enum_by_nr(texture)); |
| |
| if (texUnit >= k) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glActiveTexture(texture=%s)", |
| _mesa_lookup_enum_by_nr(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]; |
| } |
| } |
| |
| |
| /* GL_ARB_multitexture */ |
| void GLAPIENTRY |
| _mesa_ClientActiveTextureARB(GLenum texture) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLuint texUnit = texture - GL_TEXTURE0; |
| ASSERT_OUTSIDE_BEGIN_END(ctx); |
| |
| if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) |
| _mesa_debug(ctx, "glClientActiveTexture %s\n", |
| _mesa_lookup_enum_by_nr(texture)); |
| |
| if (texUnit >= ctx->Const.MaxTextureCoordUnits) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glClientActiveTexture(texture)"); |
| return; |
| } |
| |
| if (ctx->Array.ActiveTexture == texUnit) |
| 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( struct gl_context *ctx ) |
| { |
| GLuint u; |
| |
| ctx->Texture._TexMatEnabled = 0x0; |
| |
| for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { |
| ASSERT(u < Elements(ctx->TextureMatrixStack)); |
| if (_math_matrix_is_dirty(ctx->TextureMatrixStack[u].Top)) { |
| _math_matrix_analyse( ctx->TextureMatrixStack[u].Top ); |
| |
| if (ctx->Texture.Unit[u]._ReallyEnabled && |
| ctx->TextureMatrixStack[u].Top->type != MATRIX_IDENTITY) |
| ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(u); |
| } |
| } |
| } |
| |
| |
| /** |
| * Examine texture unit's combine/env state to update derived state. |
| */ |
| static void |
| update_tex_combine(struct gl_context *ctx, struct gl_texture_unit *texUnit) |
| { |
| struct gl_tex_env_combine_state *combine; |
| |
| /* No combiners will apply to this. */ |
| if (texUnit->_Current->Target == GL_TEXTURE_BUFFER) |
| return; |
| |
| /* Set the texUnit->_CurrentCombine field to point to the user's combiner |
| * state, or the combiner state which is derived from traditional texenv |
| * mode. |
| */ |
| if (texUnit->EnvMode == GL_COMBINE || |
| texUnit->EnvMode == GL_COMBINE4_NV) { |
| texUnit->_CurrentCombine = & texUnit->Combine; |
| } |
| else { |
| const struct gl_texture_object *texObj = texUnit->_Current; |
| GLenum format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat; |
| |
| 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; |
| } |
| |
| combine = texUnit->_CurrentCombine; |
| |
| /* Determine number of source RGB terms in the combiner function */ |
| switch (combine->ModeRGB) { |
| case GL_REPLACE: |
| combine->_NumArgsRGB = 1; |
| break; |
| case GL_ADD: |
| case GL_ADD_SIGNED: |
| if (texUnit->EnvMode == GL_COMBINE4_NV) |
| combine->_NumArgsRGB = 4; |
| else |
| combine->_NumArgsRGB = 2; |
| break; |
| case GL_MODULATE: |
| case GL_SUBTRACT: |
| case GL_DOT3_RGB: |
| case GL_DOT3_RGBA: |
| case GL_DOT3_RGB_EXT: |
| case GL_DOT3_RGBA_EXT: |
| combine->_NumArgsRGB = 2; |
| break; |
| case GL_INTERPOLATE: |
| case GL_MODULATE_ADD_ATI: |
| case GL_MODULATE_SIGNED_ADD_ATI: |
| case GL_MODULATE_SUBTRACT_ATI: |
| combine->_NumArgsRGB = 3; |
| break; |
| case GL_BUMP_ENVMAP_ATI: |
| /* no real arguments for this case */ |
| combine->_NumArgsRGB = 0; |
| break; |
| default: |
| combine->_NumArgsRGB = 0; |
| _mesa_problem(ctx, "invalid RGB combine mode in update_texture_state"); |
| return; |
| } |
| |
| /* Determine number of source Alpha terms in the combiner function */ |
| switch (combine->ModeA) { |
| case GL_REPLACE: |
| combine->_NumArgsA = 1; |
| break; |
| case GL_ADD: |
| case GL_ADD_SIGNED: |
| if (texUnit->EnvMode == GL_COMBINE4_NV) |
| combine->_NumArgsA = 4; |
| else |
| combine->_NumArgsA = 2; |
| break; |
| case GL_MODULATE: |
| case GL_SUBTRACT: |
| combine->_NumArgsA = 2; |
| break; |
| case GL_INTERPOLATE: |
| case GL_MODULATE_ADD_ATI: |
| case GL_MODULATE_SIGNED_ADD_ATI: |
| case GL_MODULATE_SUBTRACT_ATI: |
| combine->_NumArgsA = 3; |
| break; |
| default: |
| combine->_NumArgsA = 0; |
| _mesa_problem(ctx, "invalid Alpha combine mode in update_texture_state"); |
| break; |
| } |
| } |
| |
| |
| /** |
| * \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( struct gl_context *ctx ) |
| { |
| GLuint unit; |
| struct gl_program *fprog = NULL; |
| struct gl_program *vprog = NULL; |
| GLbitfield enabledFragUnits = 0x0; |
| |
| if (ctx->Shader.CurrentVertexProgram && |
| ctx->Shader.CurrentVertexProgram->LinkStatus) { |
| vprog = ctx->Shader.CurrentVertexProgram->_LinkedShaders[MESA_SHADER_VERTEX]->Program; |
| } else if (ctx->VertexProgram._Enabled) { |
| /* XXX enable this if/when non-shader vertex programs get |
| * texture fetches: |
| vprog = &ctx->VertexProgram.Current->Base; |
| */ |
| } |
| |
| if (ctx->Shader.CurrentFragmentProgram && |
| ctx->Shader.CurrentFragmentProgram->LinkStatus) { |
| fprog = ctx->Shader.CurrentFragmentProgram->_LinkedShaders[MESA_SHADER_FRAGMENT]->Program; |
| } |
| else if (ctx->FragmentProgram._Enabled) { |
| fprog = &ctx->FragmentProgram.Current->Base; |
| } |
| |
| /* FINISHME: Geometry shader texture accesses should also be considered |
| * FINISHME: here. |
| */ |
| |
| /* TODO: only set this if there are actual changes */ |
| ctx->NewState |= _NEW_TEXTURE; |
| |
| ctx->Texture._EnabledUnits = 0x0; |
| ctx->Texture._GenFlags = 0x0; |
| ctx->Texture._TexMatEnabled = 0x0; |
| ctx->Texture._TexGenEnabled = 0x0; |
| |
| /* |
| * Update texture unit state. |
| */ |
| for (unit = 0; unit < ctx->Const.MaxCombinedTextureImageUnits; unit++) { |
| struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; |
| GLbitfield enabledVertTargets = 0x0; |
| GLbitfield enabledFragTargets = 0x0; |
| GLbitfield enabledTargets = 0x0; |
| GLuint texIndex; |
| |
| /* Get the bitmask of texture target enables. |
| * enableBits will be a mask of the TEXTURE_*_BIT flags indicating |
| * which texture targets are enabled (fixed function) or referenced |
| * by a fragment program/program. When multiple flags are set, we'll |
| * settle on the one with highest priority (see below). |
| */ |
| if (vprog) { |
| enabledVertTargets |= vprog->TexturesUsed[unit]; |
| } |
| |
| if (fprog) { |
| enabledFragTargets |= fprog->TexturesUsed[unit]; |
| } |
| else { |
| /* fixed-function fragment program */ |
| enabledFragTargets |= texUnit->Enabled; |
| } |
| |
| enabledTargets = enabledVertTargets | enabledFragTargets; |
| |
| texUnit->_ReallyEnabled = 0x0; |
| |
| if (enabledTargets == 0x0) { |
| /* neither vertex nor fragment processing uses this unit */ |
| continue; |
| } |
| |
| /* Look for the highest priority texture target that's enabled (or used |
| * by the vert/frag shaders) and "complete". That's the one we'll use |
| * for texturing. If we're using vert/frag program we're guaranteed |
| * that bitcount(enabledBits) <= 1. |
| * Note that the TEXTURE_x_INDEX values are in high to low priority. |
| */ |
| for (texIndex = 0; texIndex < NUM_TEXTURE_TARGETS; texIndex++) { |
| if (enabledTargets & (1 << texIndex)) { |
| struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex]; |
| struct gl_sampler_object *sampler = texUnit->Sampler ? |
| texUnit->Sampler : &texObj->Sampler; |
| |
| if (!_mesa_is_texture_complete(texObj, sampler)) { |
| _mesa_test_texobj_completeness(ctx, texObj); |
| } |
| if (_mesa_is_texture_complete(texObj, sampler)) { |
| texUnit->_ReallyEnabled = 1 << texIndex; |
| _mesa_reference_texobj(&texUnit->_Current, texObj); |
| break; |
| } |
| } |
| } |
| |
| if (!texUnit->_ReallyEnabled) { |
| if (fprog) { |
| /* If we get here it means the shader is expecting a texture |
| * object, but there isn't one (or it's incomplete). Use the |
| * fallback texture. |
| */ |
| struct gl_texture_object *texObj; |
| gl_texture_index texTarget; |
| |
| assert(_mesa_bitcount(enabledTargets) == 1); |
| |
| texTarget = (gl_texture_index) (ffs(enabledTargets) - 1); |
| texObj = _mesa_get_fallback_texture(ctx, texTarget); |
| |
| assert(texObj); |
| if (!texObj) { |
| /* invalid fallback texture: don't enable the texture unit */ |
| continue; |
| } |
| |
| _mesa_reference_texobj(&texUnit->_Current, texObj); |
| texUnit->_ReallyEnabled = 1 << texTarget; |
| } |
| else { |
| /* fixed-function: texture unit is really disabled */ |
| continue; |
| } |
| } |
| |
| /* if we get here, we know this texture unit is enabled */ |
| |
| ctx->Texture._EnabledUnits |= (1 << unit); |
| |
| if (enabledFragTargets) |
| enabledFragUnits |= (1 << unit); |
| |
| update_tex_combine(ctx, texUnit); |
| } |
| |
| |
| /* Determine which texture coordinate sets are actually needed */ |
| if (fprog) { |
| const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1; |
| ctx->Texture._EnabledCoordUnits |
| = (fprog->InputsRead >> FRAG_ATTRIB_TEX0) & coordMask; |
| } |
| else { |
| ctx->Texture._EnabledCoordUnits = enabledFragUnits; |
| } |
| |
| /* Setup texgen for those texture coordinate sets that are in use */ |
| for (unit = 0; unit < ctx->Const.MaxTextureCoordUnits; unit++) { |
| struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; |
| |
| texUnit->_GenFlags = 0x0; |
| |
| if (!(ctx->Texture._EnabledCoordUnits & (1 << unit))) |
| continue; |
| |
| if (texUnit->TexGenEnabled) { |
| if (texUnit->TexGenEnabled & S_BIT) { |
| texUnit->_GenFlags |= texUnit->GenS._ModeBit; |
| } |
| if (texUnit->TexGenEnabled & T_BIT) { |
| texUnit->_GenFlags |= texUnit->GenT._ModeBit; |
| } |
| if (texUnit->TexGenEnabled & R_BIT) { |
| texUnit->_GenFlags |= texUnit->GenR._ModeBit; |
| } |
| if (texUnit->TexGenEnabled & Q_BIT) { |
| texUnit->_GenFlags |= texUnit->GenQ._ModeBit; |
| } |
| |
| ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(unit); |
| ctx->Texture._GenFlags |= texUnit->_GenFlags; |
| } |
| |
| ASSERT(unit < Elements(ctx->TextureMatrixStack)); |
| if (ctx->TextureMatrixStack[unit].Top->type != MATRIX_IDENTITY) |
| ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(unit); |
| } |
| } |
| |
| |
| /** |
| * Update texture-related derived state. |
| */ |
| void |
| _mesa_update_texture( struct gl_context *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( struct gl_context *ctx ) |
| { |
| /* NOTE: these values must be in the same order as the TEXTURE_x_INDEX |
| * values! |
| */ |
| static const GLenum targets[] = { |
| GL_TEXTURE_BUFFER, |
| GL_TEXTURE_2D_ARRAY_EXT, |
| GL_TEXTURE_1D_ARRAY_EXT, |
| GL_TEXTURE_EXTERNAL_OES, |
| GL_TEXTURE_CUBE_MAP_ARB, |
| GL_TEXTURE_3D, |
| GL_TEXTURE_RECTANGLE_NV, |
| GL_TEXTURE_2D, |
| GL_TEXTURE_1D, |
| }; |
| GLint tgt; |
| |
| STATIC_ASSERT(Elements(targets) == NUM_TEXTURE_TARGETS); |
| assert(targets[TEXTURE_2D_INDEX] == GL_TEXTURE_2D); |
| assert(targets[TEXTURE_CUBE_INDEX] == GL_TEXTURE_CUBE_MAP); |
| |
| 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( struct gl_context *ctx, GLuint unit ) |
| { |
| struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; |
| GLuint tex; |
| |
| 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->BumpTarget = GL_TEXTURE0; |
| |
| texUnit->TexGenEnabled = 0x0; |
| texUnit->GenS.Mode = GL_EYE_LINEAR; |
| texUnit->GenT.Mode = GL_EYE_LINEAR; |
| texUnit->GenR.Mode = GL_EYE_LINEAR; |
| texUnit->GenQ.Mode = GL_EYE_LINEAR; |
| texUnit->GenS._ModeBit = TEXGEN_EYE_LINEAR; |
| texUnit->GenT._ModeBit = TEXGEN_EYE_LINEAR; |
| texUnit->GenR._ModeBit = TEXGEN_EYE_LINEAR; |
| texUnit->GenQ._ModeBit = TEXGEN_EYE_LINEAR; |
| |
| /* Yes, these plane coefficients are correct! */ |
| ASSIGN_4V( texUnit->GenS.ObjectPlane, 1.0, 0.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenT.ObjectPlane, 0.0, 1.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenR.ObjectPlane, 0.0, 0.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenQ.ObjectPlane, 0.0, 0.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenS.EyePlane, 1.0, 0.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenT.EyePlane, 0.0, 1.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenR.EyePlane, 0.0, 0.0, 0.0, 0.0 ); |
| ASSIGN_4V( texUnit->GenQ.EyePlane, 0.0, 0.0, 0.0, 0.0 ); |
| |
| /* no mention of this in spec, but maybe id matrix expected? */ |
| ASSIGN_4V( texUnit->RotMatrix, 1.0, 0.0, 0.0, 1.0 ); |
| |
| /* initialize current texture object ptrs to the shared default objects */ |
| for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) { |
| _mesa_reference_texobj(&texUnit->CurrentTex[tex], |
| ctx->Shared->DefaultTex[tex]); |
| } |
| } |
| |
| |
| /** |
| * Initialize texture state for the given context. |
| */ |
| GLboolean |
| _mesa_init_texture(struct gl_context *ctx) |
| { |
| GLuint u; |
| |
| /* Texture group */ |
| ctx->Texture.CurrentUnit = 0; /* multitexture */ |
| ctx->Texture._EnabledUnits = 0x0; |
| |
| for (u = 0; u < Elements(ctx->Texture.Unit); u++) |
| init_texture_unit(ctx, u); |
| |
| /* After we're done initializing the context's texture state the default |
| * texture objects' refcounts should be at least |
| * MAX_COMBINED_TEXTURE_IMAGE_UNITS + 1. |
| */ |
| assert(ctx->Shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount |
| >= MAX_COMBINED_TEXTURE_IMAGE_UNITS + 1); |
| |
| /* Allocate proxy textures */ |
| if (!alloc_proxy_textures( ctx )) |
| return GL_FALSE; |
| |
| /* GL_ARB_texture_buffer_object */ |
| _mesa_reference_buffer_object(ctx, &ctx->Texture.BufferObject, |
| ctx->Shared->NullBufferObj); |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Free dynamically-allocted texture data attached to the given context. |
| */ |
| void |
| _mesa_free_texture_data(struct gl_context *ctx) |
| { |
| GLuint u, tgt; |
| |
| /* unreference current textures */ |
| for (u = 0; u < Elements(ctx->Texture.Unit); u++) { |
| /* The _Current texture could account for another reference */ |
| _mesa_reference_texobj(&ctx->Texture.Unit[u]._Current, NULL); |
| |
| for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) { |
| _mesa_reference_texobj(&ctx->Texture.Unit[u].CurrentTex[tgt], NULL); |
| } |
| } |
| |
| /* Free proxy texture objects */ |
| for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) |
| ctx->Driver.DeleteTexture(ctx, ctx->Texture.ProxyTex[tgt]); |
| |
| /* GL_ARB_texture_buffer_object */ |
| _mesa_reference_buffer_object(ctx, &ctx->Texture.BufferObject, NULL); |
| |
| #if FEATURE_sampler_objects |
| for (u = 0; u < Elements(ctx->Texture.Unit); u++) { |
| _mesa_reference_sampler_object(ctx, &ctx->Texture.Unit[u].Sampler, NULL); |
| } |
| #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(struct gl_context *ctx) |
| { |
| GLuint u, tex; |
| |
| for (u = 0; u < Elements(ctx->Texture.Unit); u++) { |
| struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u]; |
| for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) { |
| _mesa_reference_texobj(&texUnit->CurrentTex[tex], |
| ctx->Shared->DefaultTex[tex]); |
| } |
| } |
| } |
