/* * Mesa 3-D graphics library * Version: 6.2 * * Copyright (C) 1999-2004 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 program.c * Vertex and fragment program support functions. * \author Brian Paul */ #include "glheader.h" #include "context.h" #include "hash.h" #include "imports.h" #include "macros.h" #include "mtypes.h" #include "program.h" #include "nvfragparse.h" #include "nvfragprog.h" #include "nvvertparse.h" #include "nvvertprog.h" /**********************************************************************/ /* Utility functions */ /**********************************************************************/ /* A pointer to this dummy program is put into the hash table when * glGenPrograms is called. */ struct program _mesa_DummyProgram; /** * Init context's vertex/fragment program state */ void _mesa_init_program(GLcontext *ctx) { GLuint i; ctx->Program.ErrorPos = -1; ctx->Program.ErrorString = _mesa_strdup(""); #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program ctx->VertexProgram.Enabled = GL_FALSE; ctx->VertexProgram.PointSizeEnabled = GL_FALSE; ctx->VertexProgram.TwoSideEnabled = GL_FALSE; ctx->VertexProgram.Current = (struct vertex_program *) ctx->Shared->DefaultVertexProgram; assert(ctx->VertexProgram.Current); ctx->VertexProgram.Current->Base.RefCount++; for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) { ctx->VertexProgram.TrackMatrix[i] = GL_NONE; ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV; } #endif #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program ctx->FragmentProgram.Enabled = GL_FALSE; ctx->FragmentProgram.Current = (struct fragment_program *) ctx->Shared->DefaultFragmentProgram; assert(ctx->FragmentProgram.Current); ctx->FragmentProgram.Current->Base.RefCount++; #endif #if FEATURE_ATI_fragment_shader ctx->ATIFragmentShader.Enabled = GL_FALSE; ctx->ATIFragmentShader.Current = (struct ati_fragment_shader *) ctx->Shared->DefaultFragmentShader; assert(ctx->ATIFragmentShader.Current); ctx->ATIFragmentShader.Current->Base.RefCount++; #endif } /** * Free a context's vertex/fragment program state */ void _mesa_free_program_data(GLcontext *ctx) { #if FEATURE_NV_vertex_program if (ctx->VertexProgram.Current) { ctx->VertexProgram.Current->Base.RefCount--; if (ctx->VertexProgram.Current->Base.RefCount <= 0) ctx->Driver.DeleteProgram(ctx, &(ctx->VertexProgram.Current->Base)); } #endif #if FEATURE_NV_fragment_program if (ctx->FragmentProgram.Current) { ctx->FragmentProgram.Current->Base.RefCount--; if (ctx->FragmentProgram.Current->Base.RefCount <= 0) ctx->Driver.DeleteProgram(ctx, &(ctx->FragmentProgram.Current->Base)); } #endif #if FEATURE_ATI_fragment_shader if (ctx->ATIFragmentShader.Current) { ctx->ATIFragmentShader.Current->Base.RefCount--; if (ctx->ATIFragmentShader.Current->Base.RefCount <= 0) ctx->Driver.DeleteProgram(ctx, &(ctx->ATIFragmentShader.Current->Base)); } #endif _mesa_free((void *) ctx->Program.ErrorString); } /** * Set the vertex/fragment program error state (position and error string). * This is generally called from within the parsers. */ void _mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string) { ctx->Program.ErrorPos = pos; _mesa_free((void *) ctx->Program.ErrorString); if (!string) string = ""; ctx->Program.ErrorString = _mesa_strdup(string); } /** * Find the line number and column for 'pos' within 'string'. * Return a copy of the line which contains 'pos'. Free the line with * _mesa_free(). * \param string the program string * \param pos the position within the string * \param line returns the line number corresponding to 'pos'. * \param col returns the column number corresponding to 'pos'. * \return copy of the line containing 'pos'. */ const GLubyte * _mesa_find_line_column(const GLubyte *string, const GLubyte *pos, GLint *line, GLint *col) { const GLubyte *lineStart = string; const GLubyte *p = string; GLubyte *s; int len; *line = 1; while (p != pos) { if (*p == (GLubyte) '\n') { (*line)++; lineStart = p + 1; } p++; } *col = (pos - lineStart) + 1; /* return copy of this line */ while (*p != 0 && *p != '\n') p++; len = p - lineStart; s = (GLubyte *) _mesa_malloc(len + 1); _mesa_memcpy(s, lineStart, len); s[len] = 0; return s; } /** * Initialize a new vertex/fragment program object. */ static struct program * _mesa_init_program_struct( GLcontext *ctx, struct program *prog, GLenum target, GLuint id) { (void) ctx; if (prog) { prog->Id = id; prog->Target = target; prog->Resident = GL_TRUE; prog->RefCount = 1; } return prog; } /** * Initialize a new fragment program object. */ struct program * _mesa_init_fragment_program( GLcontext *ctx, struct fragment_program *prog, GLenum target, GLuint id) { if (prog) return _mesa_init_program_struct( ctx, &prog->Base, target, id ); else return NULL; } /** * Initialize a new vertex program object. */ struct program * _mesa_init_vertex_program( GLcontext *ctx, struct vertex_program *prog, GLenum target, GLuint id) { if (prog) return _mesa_init_program_struct( ctx, &prog->Base, target, id ); else return NULL; } /** * Initialize a new ATI fragment shader object. */ struct program * _mesa_init_ati_fragment_shader( GLcontext *ctx, struct ati_fragment_shader *prog, GLenum target, GLuint id ) { if (prog) return _mesa_init_program_struct( ctx, &prog->Base, target, id ); else return NULL; } /** * Allocate and initialize a new fragment/vertex program object but * don't put it into the program hash table. Called via * ctx->Driver.NewProgram. May be overridden (ie. replaced) by a * device driver function to implement OO deriviation with additional * types not understood by this function. * * \param ctx context * \param id program id/number * \param target program target/type * \return pointer to new program object */ struct program * _mesa_new_program(GLcontext *ctx, GLenum target, GLuint id) { switch (target) { case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */ return _mesa_init_vertex_program( ctx, CALLOC_STRUCT(vertex_program), target, id ); case GL_FRAGMENT_PROGRAM_NV: case GL_FRAGMENT_PROGRAM_ARB: return _mesa_init_fragment_program( ctx, CALLOC_STRUCT(fragment_program), target, id ); case GL_FRAGMENT_SHADER_ATI: return _mesa_init_ati_fragment_shader( ctx, CALLOC_STRUCT(ati_fragment_shader), target, id ); default: _mesa_problem(ctx, "bad target in _mesa_new_program"); return NULL; } } /** * Delete a program and remove it from the hash table, ignoring the * reference count. * Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation) * by a device driver function. */ void _mesa_delete_program(GLcontext *ctx, struct program *prog) { (void) ctx; ASSERT(prog); if (prog->String) _mesa_free(prog->String); if (prog->Target == GL_VERTEX_PROGRAM_NV || prog->Target == GL_VERTEX_STATE_PROGRAM_NV) { struct vertex_program *vprog = (struct vertex_program *) prog; if (vprog->Instructions) { GLuint i; for (i = 0; i < vprog->Base.NumInstructions; i++) { if (vprog->Instructions[i].Data) _mesa_free(vprog->Instructions[i].Data); } _mesa_free(vprog->Instructions); } if (vprog->Parameters) _mesa_free_parameter_list(vprog->Parameters); } else if (prog->Target == GL_FRAGMENT_PROGRAM_NV || prog->Target == GL_FRAGMENT_PROGRAM_ARB) { struct fragment_program *fprog = (struct fragment_program *) prog; if (fprog->Instructions) { GLuint i; for (i = 0; i < fprog->Base.NumInstructions; i++) { if (fprog->Instructions[i].Data) _mesa_free(fprog->Instructions[i].Data); } _mesa_free(fprog->Instructions); } if (fprog->Parameters) _mesa_free_parameter_list(fprog->Parameters); } else if (prog->Target == GL_FRAGMENT_SHADER_ATI) { struct ati_fragment_shader *atifs = (struct ati_fragment_shader *)prog; if (atifs->Instructions) _mesa_free(atifs->Instructions); } _mesa_free(prog); } /**********************************************************************/ /* Program parameter functions */ /**********************************************************************/ struct program_parameter_list * _mesa_new_parameter_list(void) { return (struct program_parameter_list *) _mesa_calloc(sizeof(struct program_parameter_list)); } /** * Free a parameter list and all its parameters */ void _mesa_free_parameter_list(struct program_parameter_list *paramList) { _mesa_free_parameters(paramList); _mesa_free(paramList); } /** * Free all the parameters in the given list, but don't free the * paramList structure itself. */ void _mesa_free_parameters(struct program_parameter_list *paramList) { GLuint i; for (i = 0; i < paramList->NumParameters; i++) { _mesa_free((void *) paramList->Parameters[i].Name); } _mesa_free(paramList->Parameters); paramList->NumParameters = 0; paramList->Parameters = NULL; } /** * Helper function used by the functions below. */ static GLint add_parameter(struct program_parameter_list *paramList, const char *name, const GLfloat values[4], enum parameter_type type) { const GLuint n = paramList->NumParameters; paramList->Parameters = (struct program_parameter *) _mesa_realloc(paramList->Parameters, n * sizeof(struct program_parameter), (n + 1) * sizeof(struct program_parameter)); if (!paramList->Parameters) { /* out of memory */ paramList->NumParameters = 0; return -1; } else { paramList->NumParameters = n + 1; paramList->Parameters[n].Name = _mesa_strdup(name); paramList->Parameters[n].Type = type; if (values) COPY_4V(paramList->Parameters[n].Values, values); return (GLint) n; } } /** * Add a new named program parameter (Ex: NV_fragment_program DEFINE statement) * \return index of the new entry in the parameter list */ GLint _mesa_add_named_parameter(struct program_parameter_list *paramList, const char *name, const GLfloat values[4]) { return add_parameter(paramList, name, values, NAMED_PARAMETER); } /** * Add a new unnamed constant to the parameter list. * \param paramList - the parameter list * \param values - four float values * \return index of the new parameter. */ GLint _mesa_add_named_constant(struct program_parameter_list *paramList, const char *name, const GLfloat values[4]) { return add_parameter(paramList, name, values, CONSTANT); } /** * Add a new unnamed constant to the parameter list. * \param paramList - the parameter list * \param values - four float values * \return index of the new parameter. */ GLint _mesa_add_unnamed_constant(struct program_parameter_list *paramList, const GLfloat values[4]) { /* generate a new dummy name */ static GLuint n = 0; char name[20]; _mesa_sprintf(name, "constant%d", n); n++; /* store it */ return add_parameter(paramList, name, values, CONSTANT); } /** * Add a new state reference to the parameter list. * \param paramList - the parameter list * \param state - an array of 6 state tokens * * \return index of the new parameter. */ GLint _mesa_add_state_reference(struct program_parameter_list *paramList, GLint *stateTokens) { /* XXX Should we parse here and produce the parameter's * list of STATE_* tokens here, or in the parser? */ GLint a, idx; idx = add_parameter(paramList, "Some State", NULL, STATE); for (a=0; a<6; a++) paramList->Parameters[idx].StateIndexes[a] = (enum state_index) stateTokens[a]; return idx; } /** * Lookup a parameter value by name in the given parameter list. * \return pointer to the float[4] values. */ GLfloat * _mesa_lookup_parameter_value(struct program_parameter_list *paramList, GLsizei nameLen, const char *name) { GLuint i; if (!paramList) return NULL; if (nameLen == -1) { /* name is null-terminated */ for (i = 0; i < paramList->NumParameters; i++) { if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0) return paramList->Parameters[i].Values; } } else { /* name is not null-terminated, use nameLen */ for (i = 0; i < paramList->NumParameters; i++) { if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0 && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen) return paramList->Parameters[i].Values; } } return NULL; } /** * Lookup a parameter index by name in the given parameter list. * \return index of parameter in the list. */ GLint _mesa_lookup_parameter_index(struct program_parameter_list *paramList, GLsizei nameLen, const char *name) { GLint i; if (!paramList) return -1; if (nameLen == -1) { /* name is null-terminated */ for (i = 0; i < (GLint) paramList->NumParameters; i++) { if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0) return i; } } else { /* name is not null-terminated, use nameLen */ for (i = 0; i < (GLint) paramList->NumParameters; i++) { if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0 && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen) return i; } } return -1; } /** * Use the list of tokens in the state[] array to find global GL state * and return it in . Usually, four values are returned in * but matrix queries may return as many as 16 values. * This function is used for ARB vertex/fragment programs. * The program parser will produce the state[] values. */ static void _mesa_fetch_state(GLcontext *ctx, const enum state_index state[], GLfloat *value) { switch (state[0]) { case STATE_MATERIAL: { /* state[1] is either 0=front or 1=back side */ const GLuint face = (GLuint) state[1]; /* state[2] is the material attribute */ switch (state[2]) { case STATE_AMBIENT: if (face == 0) COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT]); else COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT]); return; case STATE_DIFFUSE: if (face == 0) COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE]); else COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE]); return; case STATE_SPECULAR: if (face == 0) COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR]); else COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SPECULAR]); return; case STATE_EMISSION: if (face == 0) COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION]); else COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION]); return; case STATE_SHININESS: if (face == 0) value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS][0]; else value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SHININESS][0]; value[1] = 0.0F; value[2] = 0.0F; value[3] = 1.0F; return; default: _mesa_problem(ctx, "Invalid material state in fetch_state"); return; } } case STATE_LIGHT: { /* state[1] is the light number */ const GLuint ln = (GLuint) state[1]; /* state[2] is the light attribute */ switch (state[2]) { case STATE_AMBIENT: COPY_4V(value, ctx->Light.Light[ln].Ambient); return; case STATE_DIFFUSE: COPY_4V(value, ctx->Light.Light[ln].Diffuse); return; case STATE_SPECULAR: COPY_4V(value, ctx->Light.Light[ln].Specular); return; case STATE_POSITION: COPY_4V(value, ctx->Light.Light[ln].EyePosition); return; case STATE_ATTENUATION: value[0] = ctx->Light.Light[ln].ConstantAttenuation; value[1] = ctx->Light.Light[ln].LinearAttenuation; value[2] = ctx->Light.Light[ln].QuadraticAttenuation; value[3] = ctx->Light.Light[ln].SpotExponent; return; case STATE_SPOT_DIRECTION: COPY_3V(value, ctx->Light.Light[ln].EyeDirection); value[3] = ctx->Light.Light[ln]._CosCutoff; return; case STATE_HALF: { GLfloat eye_z[] = {0, 0, 1}; /* Compute infinite half angle vector: * half-vector = light_position + (0, 0, 1) * and then normalize. w = 0 * * light.EyePosition.w should be 0 for infinite lights. */ ADD_3V(value, eye_z, ctx->Light.Light[ln].EyePosition); NORMALIZE_3FV(value); value[3] = 0; } return; default: _mesa_problem(ctx, "Invalid light state in fetch_state"); return; } } case STATE_LIGHTMODEL_AMBIENT: COPY_4V(value, ctx->Light.Model.Ambient); return; case STATE_LIGHTMODEL_SCENECOLOR: if (state[1] == 0) { /* front */ GLint i; for (i = 0; i < 3; i++) { value[i] = ctx->Light.Model.Ambient[i] * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i] + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i]; } value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; } else { /* back */ GLint i; for (i = 0; i < 3; i++) { value[i] = ctx->Light.Model.Ambient[i] * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i] + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i]; } value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; } return; case STATE_LIGHTPROD: { const GLuint ln = (GLuint) state[1]; const GLuint face = (GLuint) state[2]; GLint i; ASSERT(face == 0 || face == 1); switch (state[3]) { case STATE_AMBIENT: for (i = 0; i < 3; i++) { value[i] = ctx->Light.Light[ln].Ambient[i] * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i]; } /* [3] = material alpha */ value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3]; return; case STATE_DIFFUSE: for (i = 0; i < 3; i++) { value[i] = ctx->Light.Light[ln].Diffuse[i] * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i]; } /* [3] = material alpha */ value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3]; return; case STATE_SPECULAR: for (i = 0; i < 3; i++) { value[i] = ctx->Light.Light[ln].Specular[i] * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i]; } /* [3] = material alpha */ value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3]; return; default: _mesa_problem(ctx, "Invalid lightprod state in fetch_state"); return; } } case STATE_TEXGEN: { /* state[1] is the texture unit */ const GLuint unit = (GLuint) state[1]; /* state[2] is the texgen attribute */ switch (state[2]) { case STATE_TEXGEN_EYE_S: COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneS); return; case STATE_TEXGEN_EYE_T: COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneT); return; case STATE_TEXGEN_EYE_R: COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneR); return; case STATE_TEXGEN_EYE_Q: COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneQ); return; case STATE_TEXGEN_OBJECT_S: COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneS); return; case STATE_TEXGEN_OBJECT_T: COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneT); return; case STATE_TEXGEN_OBJECT_R: COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneR); return; case STATE_TEXGEN_OBJECT_Q: COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneQ); return; default: _mesa_problem(ctx, "Invalid texgen state in fetch_state"); return; } } case STATE_TEXENV_COLOR: { /* state[1] is the texture unit */ const GLuint unit = (GLuint) state[1]; COPY_4V(value, ctx->Texture.Unit[unit].EnvColor); } return; case STATE_FOG_COLOR: COPY_4V(value, ctx->Fog.Color); return; case STATE_FOG_PARAMS: value[0] = ctx->Fog.Density; value[1] = ctx->Fog.Start; value[2] = ctx->Fog.End; value[3] = 1.0F / (ctx->Fog.End - ctx->Fog.Start); return; case STATE_CLIPPLANE: { const GLuint plane = (GLuint) state[1]; COPY_4V(value, ctx->Transform.EyeUserPlane[plane]); } return; case STATE_POINT_SIZE: value[0] = ctx->Point.Size; value[1] = ctx->Point.MinSize; value[2] = ctx->Point.MaxSize; value[3] = ctx->Point.Threshold; return; case STATE_POINT_ATTENUATION: value[0] = ctx->Point.Params[0]; value[1] = ctx->Point.Params[1]; value[2] = ctx->Point.Params[2]; value[3] = 1.0F; return; case STATE_MATRIX: { /* state[1] = modelview, projection, texture, etc. */ /* state[2] = which texture matrix or program matrix */ /* state[3] = first column to fetch */ /* state[4] = last column to fetch */ /* state[5] = transpose, inverse or invtrans */ const GLmatrix *matrix; const enum state_index mat = state[1]; const GLuint index = (GLuint) state[2]; const GLuint first = (GLuint) state[3]; const GLuint last = (GLuint) state[4]; const enum state_index modifier = state[5]; const GLfloat *m; GLuint row, i; if (mat == STATE_MODELVIEW) { matrix = ctx->ModelviewMatrixStack.Top; } else if (mat == STATE_PROJECTION) { matrix = ctx->ProjectionMatrixStack.Top; } else if (mat == STATE_MVP) { matrix = &ctx->_ModelProjectMatrix; } else if (mat == STATE_TEXTURE) { matrix = ctx->TextureMatrixStack[index].Top; } else if (mat == STATE_PROGRAM) { matrix = ctx->ProgramMatrixStack[index].Top; } else { _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()"); return; } if (modifier == STATE_MATRIX_INVERSE || modifier == STATE_MATRIX_INVTRANS) { /* Be sure inverse is up to date: */ _math_matrix_analyse( (GLmatrix*) matrix ); m = matrix->inv; } else { m = matrix->m; } if (modifier == STATE_MATRIX_TRANSPOSE || modifier == STATE_MATRIX_INVTRANS) { for (i = 0, row = first; row <= last; row++) { value[i++] = m[row * 4 + 0]; value[i++] = m[row * 4 + 1]; value[i++] = m[row * 4 + 2]; value[i++] = m[row * 4 + 3]; } } else { for (i = 0, row = first; row <= last; row++) { value[i++] = m[row + 0]; value[i++] = m[row + 4]; value[i++] = m[row + 8]; value[i++] = m[row + 12]; } } } return; case STATE_DEPTH_RANGE: value[0] = ctx->Viewport.Near; /* near */ value[1] = ctx->Viewport.Far; /* far */ value[2] = ctx->Viewport.Far - ctx->Viewport.Near; /* far - near */ value[3] = 0; return; case STATE_FRAGMENT_PROGRAM: { /* state[1] = {STATE_ENV, STATE_LOCAL} */ /* state[2] = parameter index */ const int idx = (int) state[2]; switch (state[1]) { case STATE_ENV: COPY_4V(value, ctx->FragmentProgram.Parameters[idx]); break; case STATE_LOCAL: COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]); break; default: _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()"); return; } } return; case STATE_VERTEX_PROGRAM: { /* state[1] = {STATE_ENV, STATE_LOCAL} */ /* state[2] = parameter index */ const int idx = (int) state[2]; switch (state[1]) { case STATE_ENV: COPY_4V(value, ctx->VertexProgram.Parameters[idx]); break; case STATE_LOCAL: COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]); break; default: _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()"); return; } } return; default: _mesa_problem(ctx, "Invalid state in _mesa_fetch_state"); return; } } /** * Loop over all the parameters in a parameter list. If the parameter * is a GL state reference, look up the current value of that state * variable and put it into the parameter's Value[4] array. * This would be called at glBegin time when using a fragment program. */ void _mesa_load_state_parameters(GLcontext *ctx, struct program_parameter_list *paramList) { GLuint i; if (!paramList) return; for (i = 0; i < paramList->NumParameters; i++) { if (paramList->Parameters[i].Type == STATE) { _mesa_fetch_state(ctx, paramList->Parameters[i].StateIndexes, paramList->Parameters[i].Values); } } } /**********************************************************************/ /* API functions */ /**********************************************************************/ /** * Bind a program (make it current) * \note Called from the GL API dispatcher by both glBindProgramNV * and glBindProgramARB. */ void GLAPIENTRY _mesa_BindProgram(GLenum target, GLuint id) { struct program *prog; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); FLUSH_VERTICES(ctx, _NEW_PROGRAM); if ((target == GL_VERTEX_PROGRAM_NV && ctx->Extensions.NV_vertex_program) || (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program)) { /*** Vertex program binding ***/ struct vertex_program *curProg = ctx->VertexProgram.Current; if (curProg->Base.Id == id) { /* binding same program - no change */ return; } if (curProg->Base.Id != 0) { /* decrement refcount on previously bound vertex program */ curProg->Base.RefCount--; /* and delete if refcount goes below one */ if (curProg->Base.RefCount <= 0) { /* the program ID was already removed from the hash table */ ctx->Driver.DeleteProgram(ctx, &(curProg->Base)); } } } else if ((target == GL_FRAGMENT_PROGRAM_NV && ctx->Extensions.NV_fragment_program) || (target == GL_FRAGMENT_PROGRAM_ARB && ctx->Extensions.ARB_fragment_program)) { /*** Fragment program binding ***/ struct fragment_program *curProg = ctx->FragmentProgram.Current; if (curProg->Base.Id == id) { /* binding same program - no change */ return; } if (curProg->Base.Id != 0) { /* decrement refcount on previously bound fragment program */ curProg->Base.RefCount--; /* and delete if refcount goes below one */ if (curProg->Base.RefCount <= 0) { /* the program ID was already removed from the hash table */ ctx->Driver.DeleteProgram(ctx, &(curProg->Base)); } } } else { _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramNV/ARB(target)"); return; } /* NOTE: binding to a non-existant program is not an error. * That's supposed to be caught in glBegin. */ if (id == 0) { /* Bind default program */ prog = NULL; if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB) prog = ctx->Shared->DefaultVertexProgram; else prog = ctx->Shared->DefaultFragmentProgram; } else { /* Bind user program */ prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, id); if (!prog || prog == &_mesa_DummyProgram) { /* allocate a new program now */ prog = ctx->Driver.NewProgram(ctx, target, id); if (!prog) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramNV/ARB"); return; } _mesa_HashInsert(ctx->Shared->Programs, id, prog); } else if (prog->Target != target) { _mesa_error(ctx, GL_INVALID_OPERATION, "glBindProgramNV/ARB(target mismatch)"); return; } } /* bind now */ if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB) { ctx->VertexProgram.Current = (struct vertex_program *) prog; } else if (target == GL_FRAGMENT_PROGRAM_NV || target == GL_FRAGMENT_PROGRAM_ARB) { ctx->FragmentProgram.Current = (struct fragment_program *) prog; } /* Never null pointers */ ASSERT(ctx->VertexProgram.Current); ASSERT(ctx->FragmentProgram.Current); if (prog) prog->RefCount++; if (ctx->Driver.BindProgram) ctx->Driver.BindProgram(ctx, target, prog); } /** * Delete a list of programs. * \note Not compiled into display lists. * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB. */ void GLAPIENTRY _mesa_DeletePrograms(GLsizei n, const GLuint *ids) { GLint i; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); if (n < 0) { _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" ); return; } for (i = 0; i < n; i++) { if (ids[i] != 0) { struct program *prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, ids[i]); if (prog == &_mesa_DummyProgram) { _mesa_HashRemove(ctx->Shared->Programs, ids[i]); } else if (prog) { /* Unbind program if necessary */ if (prog->Target == GL_VERTEX_PROGRAM_NV || prog->Target == GL_VERTEX_STATE_PROGRAM_NV) { if (ctx->VertexProgram.Current && ctx->VertexProgram.Current->Base.Id == ids[i]) { /* unbind this currently bound program */ _mesa_BindProgram(prog->Target, 0); } } else if (prog->Target == GL_FRAGMENT_PROGRAM_NV || prog->Target == GL_FRAGMENT_PROGRAM_ARB) { if (ctx->FragmentProgram.Current && ctx->FragmentProgram.Current->Base.Id == ids[i]) { /* unbind this currently bound program */ _mesa_BindProgram(prog->Target, 0); } } else { _mesa_problem(ctx, "bad target in glDeleteProgramsNV"); return; } /* The ID is immediately available for re-use now */ _mesa_HashRemove(ctx->Shared->Programs, ids[i]); prog->RefCount--; if (prog->RefCount <= 0) { ctx->Driver.DeleteProgram(ctx, prog); } } } } } /** * Generate a list of new program identifiers. * \note Not compiled into display lists. * \note Called by both glGenProgramsNV and glGenProgramsARB. */ void GLAPIENTRY _mesa_GenPrograms(GLsizei n, GLuint *ids) { GLuint first; GLuint i; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (n < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms"); return; } if (!ids) return; first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n); /* Insert pointer to dummy program as placeholder */ for (i = 0; i < (GLuint) n; i++) { _mesa_HashInsert(ctx->Shared->Programs, first + i, &_mesa_DummyProgram); } /* Return the program names */ for (i = 0; i < (GLuint) n; i++) { ids[i] = first + i; } } /** * Determine if id names a vertex or fragment program. * \note Not compiled into display lists. * \note Called from both glIsProgramNV and glIsProgramARB. * \param id is the program identifier * \return GL_TRUE if id is a program, else GL_FALSE. */ GLboolean GLAPIENTRY _mesa_IsProgram(GLuint id) { GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); if (id == 0) return GL_FALSE; if (_mesa_HashLookup(ctx->Shared->Programs, id)) return GL_TRUE; else return GL_FALSE; } /**********************************************************************/ /* GL_MESA_program_debug extension */ /**********************************************************************/ /* XXX temporary */ GLAPI void GLAPIENTRY glProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback, GLvoid *data) { _mesa_ProgramCallbackMESA(target, callback, data); } void _mesa_ProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback, GLvoid *data) { GET_CURRENT_CONTEXT(ctx); switch (target) { case GL_FRAGMENT_PROGRAM_ARB: if (!ctx->Extensions.ARB_fragment_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)"); return; } ctx->FragmentProgram.Callback = callback; ctx->FragmentProgram.CallbackData = data; break; case GL_FRAGMENT_PROGRAM_NV: if (!ctx->Extensions.NV_fragment_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)"); return; } ctx->FragmentProgram.Callback = callback; ctx->FragmentProgram.CallbackData = data; break; case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */ if (!ctx->Extensions.ARB_vertex_program && !ctx->Extensions.NV_vertex_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)"); return; } ctx->VertexProgram.Callback = callback; ctx->VertexProgram.CallbackData = data; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)"); return; } } /* XXX temporary */ GLAPI void GLAPIENTRY glGetProgramRegisterfvMESA(GLenum target, GLsizei len, const GLubyte *registerName, GLfloat *v) { _mesa_GetProgramRegisterfvMESA(target, len, registerName, v); } void _mesa_GetProgramRegisterfvMESA(GLenum target, GLsizei len, const GLubyte *registerName, GLfloat *v) { char reg[1000]; GET_CURRENT_CONTEXT(ctx); /* We _should_ be inside glBegin/glEnd */ #if 0 if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA"); return; } #endif /* make null-terminated copy of registerName */ len = MIN2((unsigned int) len, sizeof(reg) - 1); _mesa_memcpy(reg, registerName, len); reg[len] = 0; switch (target) { case GL_VERTEX_PROGRAM_NV: if (!ctx->Extensions.ARB_vertex_program && !ctx->Extensions.NV_vertex_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramRegisterfvMESA(target)"); return; } if (!ctx->VertexProgram._Enabled) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA"); return; } /* GL_NV_vertex_program */ if (reg[0] == 'R') { /* Temp register */ GLint i = _mesa_atoi(reg + 1); if (i >= (GLint)ctx->Const.MaxVertexProgramTemps) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } COPY_4V(v, ctx->VertexProgram.Temporaries[i]); } else if (reg[0] == 'v' && reg[1] == '[') { /* Vertex Input attribute */ GLuint i; for (i = 0; i < ctx->Const.MaxVertexProgramAttribs; i++) { const char *name = _mesa_nv_vertex_input_register_name(i); char number[10]; sprintf(number, "%d", i); if (_mesa_strncmp(reg + 2, name, 4) == 0 || _mesa_strncmp(reg + 2, number, _mesa_strlen(number)) == 0) { COPY_4V(v, ctx->VertexProgram.Inputs[i]); return; } } _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } else if (reg[0] == 'o' && reg[1] == '[') { /* Vertex output attribute */ } /* GL_ARB_vertex_program */ else if (_mesa_strncmp(reg, "vertex.", 7) == 0) { } else { _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } break; case GL_FRAGMENT_PROGRAM_ARB: if (!ctx->Extensions.ARB_fragment_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramRegisterfvMESA(target)"); return; } if (!ctx->FragmentProgram._Enabled) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA"); return; } /* XXX to do */ break; case GL_FRAGMENT_PROGRAM_NV: if (!ctx->Extensions.NV_fragment_program) { _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramRegisterfvMESA(target)"); return; } if (!ctx->FragmentProgram._Enabled) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA"); return; } if (reg[0] == 'R') { /* Temp register */ GLint i = _mesa_atoi(reg + 1); if (i >= (GLint)ctx->Const.MaxFragmentProgramTemps) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } COPY_4V(v, ctx->FragmentProgram.Machine.Temporaries[i]); } else if (reg[0] == 'f' && reg[1] == '[') { /* Fragment input attribute */ GLuint i; for (i = 0; i < ctx->Const.MaxFragmentProgramAttribs; i++) { const char *name = _mesa_nv_fragment_input_register_name(i); if (_mesa_strncmp(reg + 2, name, 4) == 0) { COPY_4V(v, ctx->FragmentProgram.Machine.Inputs[i]); return; } } _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } else if (_mesa_strcmp(reg, "o[COLR]") == 0) { /* Fragment output color */ COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLR]); } else if (_mesa_strcmp(reg, "o[COLH]") == 0) { /* Fragment output color */ COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLH]); } else if (_mesa_strcmp(reg, "o[DEPR]") == 0) { /* Fragment output depth */ COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_DEPR]); } else { /* try user-defined identifiers */ const GLfloat *value = _mesa_lookup_parameter_value( ctx->FragmentProgram.Current->Parameters, -1, reg); if (value) { COPY_4V(v, value); } else { _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramRegisterfvMESA(registerName)"); return; } } break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramRegisterfvMESA(target)"); return; } }