| /* |
| * Mesa 3-D graphics library |
| * |
| * 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <stdbool.h> |
| #include "glheader.h" |
| #include "api_validate.h" |
| #include "arrayobj.h" |
| #include "bufferobj.h" |
| #include "context.h" |
| #include "imports.h" |
| #include "mtypes.h" |
| #include "pipelineobj.h" |
| #include "enums.h" |
| #include "state.h" |
| #include "transformfeedback.h" |
| #include "uniforms.h" |
| #include "vbo/vbo.h" |
| #include "program/prog_print.h" |
| |
| |
| static bool |
| check_blend_func_error(struct gl_context *ctx) |
| { |
| /* The ARB_blend_func_extended spec's ERRORS section says: |
| * |
| * "The error INVALID_OPERATION is generated by Begin or any procedure |
| * that implicitly calls Begin if any draw buffer has a blend function |
| * requiring the second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, |
| * SRC1_ALPHA or ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that |
| * has more than the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active |
| * color attachements." |
| */ |
| for (unsigned i = ctx->Const.MaxDualSourceDrawBuffers; |
| i < ctx->DrawBuffer->_NumColorDrawBuffers; |
| i++) { |
| if (ctx->Color.Blend[i]._UsesDualSrc) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "dual source blend on illegal attachment"); |
| return false; |
| } |
| } |
| |
| if (ctx->Color.BlendEnabled && ctx->Color._AdvancedBlendMode) { |
| /* The KHR_blend_equation_advanced spec says: |
| * |
| * "If any non-NONE draw buffer uses a blend equation found in table |
| * X.1 or X.2, the error INVALID_OPERATION is generated by Begin or |
| * any operation that implicitly calls Begin (such as DrawElements) |
| * if: |
| * |
| * * the draw buffer for color output zero selects multiple color |
| * buffers (e.g., FRONT_AND_BACK in the default framebuffer); or |
| * |
| * * the draw buffer for any other color output is not NONE." |
| */ |
| if (ctx->DrawBuffer->ColorDrawBuffer[0] == GL_FRONT_AND_BACK) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "advanced blending is active and draw buffer for color " |
| "output zero selects multiple color buffers"); |
| return false; |
| } |
| |
| for (unsigned i = 1; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) { |
| if (ctx->DrawBuffer->ColorDrawBuffer[i] != GL_NONE) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "advanced blending is active with multiple color " |
| "draw buffers"); |
| return false; |
| } |
| } |
| |
| /* The KHR_blend_equation_advanced spec says: |
| * |
| * "Advanced blending equations require the use of a fragment shader |
| * with a matching "blend_support" layout qualifier. If the current |
| * blend equation is found in table X.1 or X.2, and the active |
| * fragment shader does not include the layout qualifier matching |
| * the blend equation or "blend_support_all_equations", the error |
| * INVALID_OPERATION is generated [...]" |
| */ |
| const struct gl_program *prog = ctx->_Shader->_CurrentFragmentProgram; |
| const GLbitfield blend_support = !prog ? 0 : prog->sh.fs.BlendSupport; |
| |
| if ((blend_support & ctx->Color._AdvancedBlendMode) == 0) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "fragment shader does not allow advanced blending mode " |
| "(%s)", |
| _mesa_enum_to_string(ctx->Color.Blend[0].EquationRGB)); |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| /** |
| * Prior to drawing anything with glBegin, glDrawArrays, etc. this function |
| * is called to see if it's valid to render. This involves checking that |
| * the current shader is valid and the framebuffer is complete. |
| * It also check the current pipeline object is valid if any. |
| * If an error is detected it'll be recorded here. |
| * \return GL_TRUE if OK to render, GL_FALSE if not |
| */ |
| GLboolean |
| _mesa_valid_to_render(struct gl_context *ctx, const char *where) |
| { |
| /* This depends on having up to date derived state (shaders) */ |
| if (ctx->NewState) |
| _mesa_update_state(ctx); |
| |
| if (ctx->API == API_OPENGL_COMPAT) { |
| /* Any shader stages that are not supplied by the GLSL shader and have |
| * assembly shaders enabled must now be validated. |
| */ |
| if (!ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX] |
| && ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(vertex program not valid)", where); |
| return GL_FALSE; |
| } |
| |
| if (!ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT]) { |
| if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(fragment program not valid)", where); |
| return GL_FALSE; |
| } |
| |
| /* If drawing to integer-valued color buffers, there must be an |
| * active fragment shader (GL_EXT_texture_integer). |
| */ |
| if (ctx->DrawBuffer && ctx->DrawBuffer->_IntegerBuffers) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(integer format but no fragment shader)", where); |
| return GL_FALSE; |
| } |
| } |
| } |
| |
| /* A pipeline object is bound */ |
| if (ctx->_Shader->Name && !ctx->_Shader->Validated) { |
| if (!_mesa_validate_program_pipeline(ctx, ctx->_Shader)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glValidateProgramPipeline failed to validate the " |
| "pipeline"); |
| return GL_FALSE; |
| } |
| } |
| |
| /* If a program is active and SSO not in use, check if validation of |
| * samplers succeeded for the active program. */ |
| if (ctx->_Shader->ActiveProgram && ctx->_Shader != ctx->Pipeline.Current) { |
| char errMsg[100]; |
| if (!_mesa_sampler_uniforms_are_valid(ctx->_Shader->ActiveProgram, |
| errMsg, 100)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "%s", errMsg); |
| return GL_FALSE; |
| } |
| } |
| |
| if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
| "%s(incomplete framebuffer)", where); |
| return GL_FALSE; |
| } |
| |
| if (!check_blend_func_error(ctx)) { |
| return GL_FALSE; |
| } |
| |
| #ifdef DEBUG |
| if (ctx->_Shader->Flags & GLSL_LOG) { |
| struct gl_shader_program **shProg = ctx->_Shader->CurrentProgram; |
| gl_shader_stage i; |
| |
| for (i = 0; i < MESA_SHADER_STAGES; i++) { |
| if (shProg[i] == NULL || shProg[i]->_LinkedShaders[i] == NULL || |
| shProg[i]->_LinkedShaders[i]->Program->_Used) |
| continue; |
| |
| /* This is the first time this shader is being used. |
| * Append shader's constants/uniforms to log file. |
| * |
| * Only log data for the program target that matches the shader |
| * target. It's possible to have a program bound to the vertex |
| * shader target that also supplied a fragment shader. If that |
| * program isn't also bound to the fragment shader target we don't |
| * want to log its fragment data. |
| */ |
| _mesa_append_uniforms_to_file(shProg[i]->_LinkedShaders[i]->Program); |
| } |
| |
| for (i = 0; i < MESA_SHADER_STAGES; i++) { |
| if (shProg[i] != NULL && shProg[i]->_LinkedShaders[i] != NULL) |
| shProg[i]->_LinkedShaders[i]->Program->_Used = GL_TRUE; |
| } |
| } |
| #endif |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Check if OK to draw arrays/elements. |
| */ |
| static bool |
| check_valid_to_render(struct gl_context *ctx, const char *function) |
| { |
| if (!_mesa_valid_to_render(ctx, function)) { |
| return false; |
| } |
| |
| if (!_mesa_all_buffers_are_unmapped(ctx->Array.VAO)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(vertex buffers are mapped)", function); |
| return false; |
| } |
| |
| switch (ctx->API) { |
| case API_OPENGLES2: |
| /* For ES2, we can draw if we have a vertex program/shader). */ |
| return ctx->VertexProgram._Current != NULL; |
| |
| case API_OPENGLES: |
| /* For OpenGL ES, only draw if we have vertex positions |
| */ |
| if (!ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Enabled) |
| return false; |
| break; |
| |
| case API_OPENGL_CORE: |
| /* Section 10.4 (Drawing Commands Using Vertex Arrays) of the OpenGL 4.5 |
| * Core Profile spec says: |
| * |
| * "An INVALID_OPERATION error is generated if no vertex array |
| * object is bound (see section 10.3.1)." |
| */ |
| if (ctx->Array.VAO == ctx->Array.DefaultVAO) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "%s(no VAO bound)", function); |
| return false; |
| } |
| |
| /* The spec argues that this is allowed because a tess ctrl shader |
| * without a tess eval shader can be used with transform feedback. |
| * However, glBeginTransformFeedback doesn't allow GL_PATCHES and |
| * therefore doesn't allow tessellation. |
| * |
| * Further investigation showed that this is indeed a spec bug and |
| * a tess ctrl shader without a tess eval shader shouldn't have been |
| * allowed, because there is no API in GL 4.0 that can make use this |
| * to produce something useful. |
| * |
| * Also, all vendors except one don't support a tess ctrl shader without |
| * a tess eval shader anyway. |
| */ |
| if (ctx->TessCtrlProgram._Current && !ctx->TessEvalProgram._Current) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(tess eval shader is missing)", function); |
| return false; |
| } |
| |
| /* Section 7.3 (Program Objects) of the OpenGL 4.5 Core Profile spec |
| * says: |
| * |
| * "If there is no active program for the vertex or fragment shader |
| * stages, the results of vertex and/or fragment processing will be |
| * undefined. However, this is not an error." |
| * |
| * The fragment shader is not tested here because other state (e.g., |
| * GL_RASTERIZER_DISCARD) affects whether or not we actually care. |
| */ |
| return ctx->VertexProgram._Current != NULL; |
| |
| case API_OPENGL_COMPAT: |
| if (ctx->VertexProgram._Current != NULL) { |
| /* Draw regardless of whether or not we have any vertex arrays. |
| * (Ex: could draw a point using a constant vertex pos) |
| */ |
| return true; |
| } else { |
| /* Draw if we have vertex positions (GL_VERTEX_ARRAY or generic |
| * array [0]). |
| */ |
| return (ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Enabled || |
| ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_GENERIC0].Enabled); |
| } |
| break; |
| |
| default: |
| unreachable("Invalid API value in check_valid_to_render()"); |
| } |
| |
| return true; |
| } |
| |
| |
| /** |
| * Is 'mode' a valid value for glBegin(), glDrawArrays(), glDrawElements(), |
| * etc? The set of legal values depends on whether geometry shaders/programs |
| * are supported. |
| * Note: This may be called during display list compilation. |
| */ |
| bool |
| _mesa_is_valid_prim_mode(struct gl_context *ctx, GLenum mode) |
| { |
| /* The overwhelmingly common case is (mode <= GL_TRIANGLE_FAN). Test that |
| * first and exit. You would think that a switch-statement would be the |
| * right approach, but at least GCC 4.7.2 generates some pretty dire code |
| * for the common case. |
| */ |
| if (likely(mode <= GL_TRIANGLE_FAN)) |
| return true; |
| |
| if (mode <= GL_POLYGON) |
| return (ctx->API == API_OPENGL_COMPAT); |
| |
| if (mode <= GL_TRIANGLE_STRIP_ADJACENCY) |
| return _mesa_has_geometry_shaders(ctx); |
| |
| if (mode == GL_PATCHES) |
| return _mesa_has_tessellation(ctx); |
| |
| return false; |
| } |
| |
| |
| /** |
| * Is 'mode' a valid value for glBegin(), glDrawArrays(), glDrawElements(), |
| * etc? Also, do additional checking related to transformation feedback. |
| * Note: this function cannot be called during glNewList(GL_COMPILE) because |
| * this code depends on current transform feedback state. |
| * Also, do additional checking related to tessellation shaders. |
| */ |
| GLboolean |
| _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) |
| { |
| bool valid_enum = _mesa_is_valid_prim_mode(ctx, mode); |
| |
| if (!valid_enum) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "%s(mode=%x)", name, mode); |
| return GL_FALSE; |
| } |
| |
| /* From the OpenGL 4.5 specification, section 11.3.1: |
| * |
| * The error INVALID_OPERATION is generated if Begin, or any command that |
| * implicitly calls Begin, is called when a geometry shader is active and: |
| * |
| * * the input primitive type of the current geometry shader is |
| * POINTS and <mode> is not POINTS, |
| * |
| * * the input primitive type of the current geometry shader is |
| * LINES and <mode> is not LINES, LINE_STRIP, or LINE_LOOP, |
| * |
| * * the input primitive type of the current geometry shader is |
| * TRIANGLES and <mode> is not TRIANGLES, TRIANGLE_STRIP or |
| * TRIANGLE_FAN, |
| * |
| * * the input primitive type of the current geometry shader is |
| * LINES_ADJACENCY_ARB and <mode> is not LINES_ADJACENCY_ARB or |
| * LINE_STRIP_ADJACENCY_ARB, or |
| * |
| * * the input primitive type of the current geometry shader is |
| * TRIANGLES_ADJACENCY_ARB and <mode> is not |
| * TRIANGLES_ADJACENCY_ARB or TRIANGLE_STRIP_ADJACENCY_ARB. |
| * |
| * The GL spec doesn't mention any interaction with tessellation, which |
| * is clearly a spec bug. The same rule should apply, but instead of |
| * the draw primitive mode, the tessellation evaluation shader primitive |
| * mode should be used for the checking. |
| */ |
| if (ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]) { |
| const GLenum geom_mode = |
| ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]-> |
| _LinkedShaders[MESA_SHADER_GEOMETRY]->info.Geom.InputType; |
| struct gl_shader_program *tes = |
| ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL]; |
| GLenum mode_before_gs = mode; |
| |
| if (tes) { |
| struct gl_linked_shader *tes_sh = |
| tes->_LinkedShaders[MESA_SHADER_TESS_EVAL]; |
| if (tes_sh->info.TessEval.PointMode) |
| mode_before_gs = GL_POINTS; |
| else if (tes_sh->info.TessEval.PrimitiveMode == GL_ISOLINES) |
| mode_before_gs = GL_LINES; |
| else |
| /* the GL_QUADS mode generates triangles too */ |
| mode_before_gs = GL_TRIANGLES; |
| } |
| |
| switch (mode_before_gs) { |
| case GL_POINTS: |
| valid_enum = (geom_mode == GL_POINTS); |
| break; |
| case GL_LINES: |
| case GL_LINE_LOOP: |
| case GL_LINE_STRIP: |
| valid_enum = (geom_mode == GL_LINES); |
| break; |
| case GL_TRIANGLES: |
| case GL_TRIANGLE_STRIP: |
| case GL_TRIANGLE_FAN: |
| valid_enum = (geom_mode == GL_TRIANGLES); |
| break; |
| case GL_QUADS: |
| case GL_QUAD_STRIP: |
| case GL_POLYGON: |
| valid_enum = false; |
| break; |
| case GL_LINES_ADJACENCY: |
| case GL_LINE_STRIP_ADJACENCY: |
| valid_enum = (geom_mode == GL_LINES_ADJACENCY); |
| break; |
| case GL_TRIANGLES_ADJACENCY: |
| case GL_TRIANGLE_STRIP_ADJACENCY: |
| valid_enum = (geom_mode == GL_TRIANGLES_ADJACENCY); |
| break; |
| default: |
| valid_enum = false; |
| break; |
| } |
| if (!valid_enum) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(mode=%s vs geometry shader input %s)", |
| name, |
| _mesa_lookup_prim_by_nr(mode_before_gs), |
| _mesa_lookup_prim_by_nr(geom_mode)); |
| return GL_FALSE; |
| } |
| } |
| |
| /* From the OpenGL 4.0 (Core Profile) spec (section 2.12): |
| * |
| * "Tessellation operates only on patch primitives. If tessellation is |
| * active, any command that transfers vertices to the GL will |
| * generate an INVALID_OPERATION error if the primitive mode is not |
| * PATCHES. |
| * Patch primitives are not supported by pipeline stages below the |
| * tessellation evaluation shader. If there is no active program |
| * object or the active program object does not contain a tessellation |
| * evaluation shader, the error INVALID_OPERATION is generated by any |
| * command that transfers vertices to the GL if the primitive mode is |
| * PATCHES." |
| * |
| */ |
| if (ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL] || |
| ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_CTRL]) { |
| if (mode != GL_PATCHES) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "only GL_PATCHES valid with tessellation"); |
| return GL_FALSE; |
| } |
| } |
| else { |
| if (mode == GL_PATCHES) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "GL_PATCHES only valid with tessellation"); |
| return GL_FALSE; |
| } |
| } |
| |
| /* From the GL_EXT_transform_feedback spec: |
| * |
| * "The error INVALID_OPERATION is generated if Begin, or any command |
| * that performs an explicit Begin, is called when: |
| * |
| * * a geometry shader is not active and <mode> does not match the |
| * allowed begin modes for the current transform feedback state as |
| * given by table X.1. |
| * |
| * * a geometry shader is active and the output primitive type of the |
| * geometry shader does not match the allowed begin modes for the |
| * current transform feedback state as given by table X.1. |
| * |
| */ |
| if (_mesa_is_xfb_active_and_unpaused(ctx)) { |
| GLboolean pass = GL_TRUE; |
| |
| if(ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]) { |
| switch (ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]-> |
| _LinkedShaders[MESA_SHADER_GEOMETRY]-> |
| info.Geom.OutputType) { |
| case GL_POINTS: |
| pass = ctx->TransformFeedback.Mode == GL_POINTS; |
| break; |
| case GL_LINE_STRIP: |
| pass = ctx->TransformFeedback.Mode == GL_LINES; |
| break; |
| case GL_TRIANGLE_STRIP: |
| pass = ctx->TransformFeedback.Mode == GL_TRIANGLES; |
| break; |
| default: |
| pass = GL_FALSE; |
| } |
| } |
| else if (ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL]) { |
| struct gl_shader_program *tes = |
| ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL]; |
| struct gl_linked_shader *tes_sh = |
| tes->_LinkedShaders[MESA_SHADER_TESS_EVAL]; |
| if (tes_sh->info.TessEval.PointMode) |
| pass = ctx->TransformFeedback.Mode == GL_POINTS; |
| else if (tes_sh->info.TessEval.PrimitiveMode == GL_ISOLINES) |
| pass = ctx->TransformFeedback.Mode == GL_LINES; |
| else |
| pass = ctx->TransformFeedback.Mode == GL_TRIANGLES; |
| } |
| else { |
| switch (mode) { |
| case GL_POINTS: |
| pass = ctx->TransformFeedback.Mode == GL_POINTS; |
| break; |
| case GL_LINES: |
| case GL_LINE_STRIP: |
| case GL_LINE_LOOP: |
| pass = ctx->TransformFeedback.Mode == GL_LINES; |
| break; |
| default: |
| pass = ctx->TransformFeedback.Mode == GL_TRIANGLES; |
| break; |
| } |
| } |
| if (!pass) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(mode=%s vs transform feedback %s)", |
| name, |
| _mesa_lookup_prim_by_nr(mode), |
| _mesa_lookup_prim_by_nr(ctx->TransformFeedback.Mode)); |
| return GL_FALSE; |
| } |
| } |
| |
| /* From GL_INTEL_conservative_rasterization spec: |
| * |
| * The conservative rasterization option applies only to polygons with |
| * PolygonMode state set to FILL. Draw requests for polygons with different |
| * PolygonMode setting or for other primitive types (points/lines) generate |
| * INVALID_OPERATION error. |
| */ |
| if (ctx->IntelConservativeRasterization) { |
| GLboolean pass = GL_TRUE; |
| |
| switch (mode) { |
| case GL_POINTS: |
| case GL_LINES: |
| case GL_LINE_LOOP: |
| case GL_LINE_STRIP: |
| case GL_LINES_ADJACENCY: |
| case GL_LINE_STRIP_ADJACENCY: |
| pass = GL_FALSE; |
| break; |
| case GL_TRIANGLES: |
| case GL_TRIANGLE_STRIP: |
| case GL_TRIANGLE_FAN: |
| case GL_QUADS: |
| case GL_QUAD_STRIP: |
| case GL_POLYGON: |
| case GL_TRIANGLES_ADJACENCY: |
| case GL_TRIANGLE_STRIP_ADJACENCY: |
| if (ctx->Polygon.FrontMode != GL_FILL || |
| ctx->Polygon.BackMode != GL_FILL) |
| pass = GL_FALSE; |
| break; |
| default: |
| pass = GL_FALSE; |
| } |
| if (!pass) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "mode=%s invalid with GL_INTEL_conservative_rasterization", |
| _mesa_lookup_prim_by_nr(mode)); |
| return GL_FALSE; |
| } |
| } |
| |
| return GL_TRUE; |
| } |
| |
| /** |
| * Verify that the element type is valid. |
| * |
| * Generates \c GL_INVALID_ENUM and returns \c false if it is not. |
| */ |
| static bool |
| valid_elements_type(struct gl_context *ctx, GLenum type, const char *name) |
| { |
| switch (type) { |
| case GL_UNSIGNED_BYTE: |
| case GL_UNSIGNED_SHORT: |
| case GL_UNSIGNED_INT: |
| return true; |
| |
| default: |
| _mesa_error(ctx, GL_INVALID_ENUM, "%s(type = %s)", name, |
| _mesa_enum_to_string(type)); |
| return false; |
| } |
| } |
| |
| static bool |
| validate_DrawElements_common(struct gl_context *ctx, |
| GLenum mode, GLsizei count, GLenum type, |
| const GLvoid *indices, |
| const char *caller) |
| { |
| /* Section 2.14.2 (Transform Feedback Primitive Capture) of the OpenGL ES |
| * 3.1 spec says: |
| * |
| * The error INVALID_OPERATION is also generated by DrawElements, |
| * DrawElementsInstanced, and DrawRangeElements while transform feedback |
| * is active and not paused, regardless of mode. |
| * |
| * The OES_geometry_shader_spec says: |
| * |
| * Issues: |
| * |
| * ... |
| * |
| * (13) Does this extension change how transform feedback operates |
| * compared to unextended OpenGL ES 3.0 or 3.1? |
| * |
| * RESOLVED: Yes... Since we no longer require being able to predict how |
| * much geometry will be generated, we also lift the restriction that |
| * only DrawArray* commands are supported and also support the |
| * DrawElements* commands for transform feedback. |
| * |
| * This should also be reflected in the body of the spec, but that appears |
| * to have been overlooked. The body of the spec only explicitly allows |
| * the indirect versions. |
| */ |
| if (_mesa_is_gles3(ctx) && !ctx->Extensions.OES_geometry_shader && |
| _mesa_is_xfb_active_and_unpaused(ctx)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(transform feedback active)", caller); |
| return false; |
| } |
| |
| if (count < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", caller); |
| return false; |
| } |
| |
| if (!_mesa_valid_prim_mode(ctx, mode, caller)) { |
| return false; |
| } |
| |
| if (!valid_elements_type(ctx, type, caller)) |
| return false; |
| |
| if (!check_valid_to_render(ctx, caller)) |
| return false; |
| |
| /* Not using a VBO for indices, so avoid NULL pointer derefs later. |
| */ |
| if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj) && indices == NULL) |
| return false; |
| |
| if (count == 0) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * Error checking for glDrawElements(). Includes parameter checking |
| * and VBO bounds checking. |
| * \return GL_TRUE if OK to render, GL_FALSE if error found |
| */ |
| GLboolean |
| _mesa_validate_DrawElements(struct gl_context *ctx, |
| GLenum mode, GLsizei count, GLenum type, |
| const GLvoid *indices) |
| { |
| FLUSH_CURRENT(ctx, 0); |
| |
| return validate_DrawElements_common(ctx, mode, count, type, indices, |
| "glDrawElements"); |
| } |
| |
| |
| /** |
| * Error checking for glMultiDrawElements(). Includes parameter checking |
| * and VBO bounds checking. |
| * \return GL_TRUE if OK to render, GL_FALSE if error found |
| */ |
| GLboolean |
| _mesa_validate_MultiDrawElements(struct gl_context *ctx, |
| GLenum mode, const GLsizei *count, |
| GLenum type, const GLvoid * const *indices, |
| GLuint primcount) |
| { |
| unsigned i; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| for (i = 0; i < primcount; i++) { |
| if (count[i] < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glMultiDrawElements(count)" ); |
| return GL_FALSE; |
| } |
| } |
| |
| if (!_mesa_valid_prim_mode(ctx, mode, "glMultiDrawElements")) { |
| return GL_FALSE; |
| } |
| |
| if (!valid_elements_type(ctx, type, "glMultiDrawElements")) |
| return GL_FALSE; |
| |
| if (!check_valid_to_render(ctx, "glMultiDrawElements")) |
| return GL_FALSE; |
| |
| /* Not using a VBO for indices, so avoid NULL pointer derefs later. |
| */ |
| if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) { |
| for (i = 0; i < primcount; i++) { |
| if (!indices[i]) |
| return GL_FALSE; |
| } |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Error checking for glDrawRangeElements(). Includes parameter checking |
| * and VBO bounds checking. |
| * \return GL_TRUE if OK to render, GL_FALSE if error found |
| */ |
| GLboolean |
| _mesa_validate_DrawRangeElements(struct gl_context *ctx, GLenum mode, |
| GLuint start, GLuint end, |
| GLsizei count, GLenum type, |
| const GLvoid *indices) |
| { |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (end < start) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)"); |
| return GL_FALSE; |
| } |
| |
| return validate_DrawElements_common(ctx, mode, count, type, indices, |
| "glDrawRangeElements"); |
| } |
| |
| static bool |
| validate_draw_arrays(struct gl_context *ctx, const char *func, |
| GLenum mode, GLsizei count, GLsizei numInstances) |
| { |
| struct gl_transform_feedback_object *xfb_obj |
| = ctx->TransformFeedback.CurrentObject; |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (count < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", func); |
| return false; |
| } |
| |
| if (!_mesa_valid_prim_mode(ctx, mode, func)) |
| return false; |
| |
| if (!check_valid_to_render(ctx, func)) |
| return false; |
| |
| /* From the GLES3 specification, section 2.14.2 (Transform Feedback |
| * Primitive Capture): |
| * |
| * The error INVALID_OPERATION is generated by DrawArrays and |
| * DrawArraysInstanced if recording the vertices of a primitive to the |
| * buffer objects being used for transform feedback purposes would result |
| * in either exceeding the limits of any buffer object’s size, or in |
| * exceeding the end position offset + size − 1, as set by |
| * BindBufferRange. |
| * |
| * This is in contrast to the behaviour of desktop GL, where the extra |
| * primitives are silently dropped from the transform feedback buffer. |
| * |
| * This text is removed in ES 3.2, presumably because it's not really |
| * implementable with geometry and tessellation shaders. In fact, |
| * the OES_geometry_shader spec says: |
| * |
| * "(13) Does this extension change how transform feedback operates |
| * compared to unextended OpenGL ES 3.0 or 3.1? |
| * |
| * RESOLVED: Yes. Because dynamic geometry amplification in a geometry |
| * shader can make it difficult if not impossible to predict the amount |
| * of geometry that may be generated in advance of executing the shader, |
| * the draw-time error for transform feedback buffer overflow conditions |
| * is removed and replaced with the GL behavior (primitives are not |
| * written and the corresponding counter is not updated)..." |
| */ |
| if (_mesa_is_gles3(ctx) && _mesa_is_xfb_active_and_unpaused(ctx) && |
| !_mesa_has_OES_geometry_shader(ctx) && |
| !_mesa_has_OES_tessellation_shader(ctx)) { |
| size_t prim_count = vbo_count_tessellated_primitives(mode, count, 1); |
| if (xfb_obj->GlesRemainingPrims < prim_count) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(exceeds transform feedback size)", func); |
| return false; |
| } |
| xfb_obj->GlesRemainingPrims -= prim_count; |
| } |
| |
| if (count == 0) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * Called from the tnl module to error check the function parameters and |
| * verify that we really can draw something. |
| * \return GL_TRUE if OK to render, GL_FALSE if error found |
| */ |
| GLboolean |
| _mesa_validate_DrawArrays(struct gl_context *ctx, GLenum mode, GLsizei count) |
| { |
| return validate_draw_arrays(ctx, "glDrawArrays", mode, count, 1); |
| } |
| |
| |
| GLboolean |
| _mesa_validate_DrawArraysInstanced(struct gl_context *ctx, GLenum mode, GLint first, |
| GLsizei count, GLsizei numInstances) |
| { |
| if (first < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDrawArraysInstanced(start=%d)", first); |
| return GL_FALSE; |
| } |
| |
| if (numInstances <= 0) { |
| if (numInstances < 0) |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDrawArraysInstanced(numInstances=%d)", numInstances); |
| return GL_FALSE; |
| } |
| |
| return validate_draw_arrays(ctx, "glDrawArraysInstanced", mode, count, 1); |
| } |
| |
| |
| GLboolean |
| _mesa_validate_DrawElementsInstanced(struct gl_context *ctx, |
| GLenum mode, GLsizei count, GLenum type, |
| const GLvoid *indices, GLsizei numInstances) |
| { |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (numInstances < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDrawElementsInstanced(numInstances=%d)", numInstances); |
| return GL_FALSE; |
| } |
| |
| return validate_DrawElements_common(ctx, mode, count, type, indices, |
| "glDrawElementsInstanced") |
| && (numInstances > 0); |
| } |
| |
| |
| GLboolean |
| _mesa_validate_DrawTransformFeedback(struct gl_context *ctx, |
| GLenum mode, |
| struct gl_transform_feedback_object *obj, |
| GLuint stream, |
| GLsizei numInstances) |
| { |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (!_mesa_valid_prim_mode(ctx, mode, "glDrawTransformFeedback*(mode)")) { |
| return GL_FALSE; |
| } |
| |
| if (!obj) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glDrawTransformFeedback*(name)"); |
| return GL_FALSE; |
| } |
| |
| /* From the GL 4.5 specification, page 429: |
| * "An INVALID_VALUE error is generated if id is not the name of a |
| * transform feedback object." |
| */ |
| if (!obj->EverBound) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glDrawTransformFeedback*(name)"); |
| return GL_FALSE; |
| } |
| |
| if (stream >= ctx->Const.MaxVertexStreams) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDrawTransformFeedbackStream*(index>=MaxVertexStream)"); |
| return GL_FALSE; |
| } |
| |
| if (!obj->EndedAnytime) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawTransformFeedback*"); |
| return GL_FALSE; |
| } |
| |
| if (numInstances <= 0) { |
| if (numInstances < 0) |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDrawTransformFeedback*Instanced(numInstances=%d)", |
| numInstances); |
| return GL_FALSE; |
| } |
| |
| if (!check_valid_to_render(ctx, "glDrawTransformFeedback*")) { |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| static GLboolean |
| valid_draw_indirect(struct gl_context *ctx, |
| GLenum mode, const GLvoid *indirect, |
| GLsizei size, const char *name) |
| { |
| const uint64_t end = (uint64_t) (uintptr_t) indirect + size; |
| |
| /* OpenGL ES 3.1 spec. section 10.5: |
| * |
| * "DrawArraysIndirect requires that all data sourced for the |
| * command, including the DrawArraysIndirectCommand |
| * structure, be in buffer objects, and may not be called when |
| * the default vertex array object is bound." |
| */ |
| if (ctx->Array.VAO == ctx->Array.DefaultVAO) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "(no VAO bound)"); |
| return GL_FALSE; |
| } |
| |
| /* From OpenGL ES 3.1 spec. section 10.5: |
| * "An INVALID_OPERATION error is generated if zero is bound to |
| * VERTEX_ARRAY_BINDING, DRAW_INDIRECT_BUFFER or to any enabled |
| * vertex array." |
| * |
| * Here we check that for each enabled vertex array we have a vertex |
| * buffer bound. |
| */ |
| if (_mesa_is_gles31(ctx) && |
| ctx->Array.VAO->_Enabled & ~ctx->Array.VAO->VertexAttribBufferMask) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, "%s(No VBO bound)", name); |
| return GL_FALSE; |
| } |
| |
| if (!_mesa_valid_prim_mode(ctx, mode, name)) |
| return GL_FALSE; |
| |
| /* OpenGL ES 3.1 specification, section 10.5: |
| * |
| * "An INVALID_OPERATION error is generated if |
| * transform feedback is active and not paused." |
| * |
| * The OES_geometry_shader spec says: |
| * |
| * On p. 250 in the errors section for the DrawArraysIndirect command, |
| * and on p. 254 in the errors section for the DrawElementsIndirect |
| * command, delete the errors which state: |
| * |
| * "An INVALID_OPERATION error is generated if transform feedback is |
| * active and not paused." |
| * |
| * (thus allowing transform feedback to work with indirect draw commands). |
| */ |
| if (_mesa_is_gles31(ctx) && !ctx->Extensions.OES_geometry_shader && |
| _mesa_is_xfb_active_and_unpaused(ctx)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(TransformFeedback is active and not paused)", name); |
| } |
| |
| /* From OpenGL version 4.4. section 10.5 |
| * and OpenGL ES 3.1, section 10.6: |
| * |
| * "An INVALID_VALUE error is generated if indirect is not a |
| * multiple of the size, in basic machine units, of uint." |
| */ |
| if ((GLsizeiptr)indirect & (sizeof(GLuint) - 1)) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "%s(indirect is not aligned)", name); |
| return GL_FALSE; |
| } |
| |
| if (!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s: no buffer bound to DRAW_INDIRECT_BUFFER", name); |
| return GL_FALSE; |
| } |
| |
| if (_mesa_check_disallowed_mapping(ctx->DrawIndirectBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(DRAW_INDIRECT_BUFFER is mapped)", name); |
| return GL_FALSE; |
| } |
| |
| /* From the ARB_draw_indirect specification: |
| * "An INVALID_OPERATION error is generated if the commands source data |
| * beyond the end of the buffer object [...]" |
| */ |
| if (ctx->DrawIndirectBuffer->Size < end) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(DRAW_INDIRECT_BUFFER too small)", name); |
| return GL_FALSE; |
| } |
| |
| if (!check_valid_to_render(ctx, name)) |
| return GL_FALSE; |
| |
| return GL_TRUE; |
| } |
| |
| static inline GLboolean |
| valid_draw_indirect_elements(struct gl_context *ctx, |
| GLenum mode, GLenum type, const GLvoid *indirect, |
| GLsizeiptr size, const char *name) |
| { |
| if (!valid_elements_type(ctx, type, name)) |
| return GL_FALSE; |
| |
| /* |
| * Unlike regular DrawElementsInstancedBaseVertex commands, the indices |
| * may not come from a client array and must come from an index buffer. |
| * If no element array buffer is bound, an INVALID_OPERATION error is |
| * generated. |
| */ |
| if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(no buffer bound to GL_ELEMENT_ARRAY_BUFFER)", name); |
| return GL_FALSE; |
| } |
| |
| return valid_draw_indirect(ctx, mode, indirect, size, name); |
| } |
| |
| static inline GLboolean |
| valid_draw_indirect_multi(struct gl_context *ctx, |
| GLsizei primcount, GLsizei stride, |
| const char *name) |
| { |
| |
| /* From the ARB_multi_draw_indirect specification: |
| * "INVALID_VALUE is generated by MultiDrawArraysIndirect or |
| * MultiDrawElementsIndirect if <primcount> is negative." |
| * |
| * "<primcount> must be positive, otherwise an INVALID_VALUE error will |
| * be generated." |
| */ |
| if (primcount < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "%s(primcount < 0)", name); |
| return GL_FALSE; |
| } |
| |
| |
| /* From the ARB_multi_draw_indirect specification: |
| * "<stride> must be a multiple of four, otherwise an INVALID_VALUE |
| * error is generated." |
| */ |
| if (stride % 4) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "%s(stride %% 4)", name); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| GLboolean |
| _mesa_validate_DrawArraysIndirect(struct gl_context *ctx, |
| GLenum mode, |
| const GLvoid *indirect) |
| { |
| const unsigned drawArraysNumParams = 4; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| return valid_draw_indirect(ctx, mode, |
| indirect, drawArraysNumParams * sizeof(GLuint), |
| "glDrawArraysIndirect"); |
| } |
| |
| GLboolean |
| _mesa_validate_DrawElementsIndirect(struct gl_context *ctx, |
| GLenum mode, GLenum type, |
| const GLvoid *indirect) |
| { |
| const unsigned drawElementsNumParams = 5; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| return valid_draw_indirect_elements(ctx, mode, type, |
| indirect, drawElementsNumParams * sizeof(GLuint), |
| "glDrawElementsIndirect"); |
| } |
| |
| GLboolean |
| _mesa_validate_MultiDrawArraysIndirect(struct gl_context *ctx, |
| GLenum mode, |
| const GLvoid *indirect, |
| GLsizei primcount, GLsizei stride) |
| { |
| GLsizeiptr size = 0; |
| const unsigned drawArraysNumParams = 4; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| /* caller has converted stride==0 to drawArraysNumParams * sizeof(GLuint) */ |
| assert(stride != 0); |
| |
| if (!valid_draw_indirect_multi(ctx, primcount, stride, |
| "glMultiDrawArraysIndirect")) |
| return GL_FALSE; |
| |
| /* number of bytes of the indirect buffer which will be read */ |
| size = primcount |
| ? (primcount - 1) * stride + drawArraysNumParams * sizeof(GLuint) |
| : 0; |
| |
| if (!valid_draw_indirect(ctx, mode, indirect, size, |
| "glMultiDrawArraysIndirect")) |
| return GL_FALSE; |
| |
| return GL_TRUE; |
| } |
| |
| GLboolean |
| _mesa_validate_MultiDrawElementsIndirect(struct gl_context *ctx, |
| GLenum mode, GLenum type, |
| const GLvoid *indirect, |
| GLsizei primcount, GLsizei stride) |
| { |
| GLsizeiptr size = 0; |
| const unsigned drawElementsNumParams = 5; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| /* caller has converted stride==0 to drawElementsNumParams * sizeof(GLuint) */ |
| assert(stride != 0); |
| |
| if (!valid_draw_indirect_multi(ctx, primcount, stride, |
| "glMultiDrawElementsIndirect")) |
| return GL_FALSE; |
| |
| /* number of bytes of the indirect buffer which will be read */ |
| size = primcount |
| ? (primcount - 1) * stride + drawElementsNumParams * sizeof(GLuint) |
| : 0; |
| |
| if (!valid_draw_indirect_elements(ctx, mode, type, |
| indirect, size, |
| "glMultiDrawElementsIndirect")) |
| return GL_FALSE; |
| |
| return GL_TRUE; |
| } |
| |
| static GLboolean |
| valid_draw_indirect_parameters(struct gl_context *ctx, |
| const char *name, |
| GLintptr drawcount) |
| { |
| /* From the ARB_indirect_parameters specification: |
| * "INVALID_VALUE is generated by MultiDrawArraysIndirectCountARB or |
| * MultiDrawElementsIndirectCountARB if <drawcount> is not a multiple of |
| * four." |
| */ |
| if (drawcount & 3) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "%s(drawcount is not a multiple of 4)", name); |
| return GL_FALSE; |
| } |
| |
| /* From the ARB_indirect_parameters specification: |
| * "INVALID_OPERATION is generated by MultiDrawArraysIndirectCountARB or |
| * MultiDrawElementsIndirectCountARB if no buffer is bound to the |
| * PARAMETER_BUFFER_ARB binding point." |
| */ |
| if (!_mesa_is_bufferobj(ctx->ParameterBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s: no buffer bound to PARAMETER_BUFFER", name); |
| return GL_FALSE; |
| } |
| |
| if (_mesa_check_disallowed_mapping(ctx->ParameterBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(PARAMETER_BUFFER is mapped)", name); |
| return GL_FALSE; |
| } |
| |
| /* From the ARB_indirect_parameters specification: |
| * "INVALID_OPERATION is generated by MultiDrawArraysIndirectCountARB or |
| * MultiDrawElementsIndirectCountARB if reading a <sizei> typed value |
| * from the buffer bound to the PARAMETER_BUFFER_ARB target at the offset |
| * specified by <drawcount> would result in an out-of-bounds access." |
| */ |
| if (ctx->ParameterBuffer->Size < drawcount + sizeof(GLsizei)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(PARAMETER_BUFFER too small)", name); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| GLboolean |
| _mesa_validate_MultiDrawArraysIndirectCount(struct gl_context *ctx, |
| GLenum mode, |
| GLintptr indirect, |
| GLintptr drawcount, |
| GLsizei maxdrawcount, |
| GLsizei stride) |
| { |
| GLsizeiptr size = 0; |
| const unsigned drawArraysNumParams = 4; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| /* caller has converted stride==0 to drawArraysNumParams * sizeof(GLuint) */ |
| assert(stride != 0); |
| |
| if (!valid_draw_indirect_multi(ctx, maxdrawcount, stride, |
| "glMultiDrawArraysIndirectCountARB")) |
| return GL_FALSE; |
| |
| /* number of bytes of the indirect buffer which will be read */ |
| size = maxdrawcount |
| ? (maxdrawcount - 1) * stride + drawArraysNumParams * sizeof(GLuint) |
| : 0; |
| |
| if (!valid_draw_indirect(ctx, mode, (void *)indirect, size, |
| "glMultiDrawArraysIndirectCountARB")) |
| return GL_FALSE; |
| |
| return valid_draw_indirect_parameters( |
| ctx, "glMultiDrawArraysIndirectCountARB", drawcount); |
| } |
| |
| GLboolean |
| _mesa_validate_MultiDrawElementsIndirectCount(struct gl_context *ctx, |
| GLenum mode, GLenum type, |
| GLintptr indirect, |
| GLintptr drawcount, |
| GLsizei maxdrawcount, |
| GLsizei stride) |
| { |
| GLsizeiptr size = 0; |
| const unsigned drawElementsNumParams = 5; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| /* caller has converted stride==0 to drawElementsNumParams * sizeof(GLuint) */ |
| assert(stride != 0); |
| |
| if (!valid_draw_indirect_multi(ctx, maxdrawcount, stride, |
| "glMultiDrawElementsIndirectCountARB")) |
| return GL_FALSE; |
| |
| /* number of bytes of the indirect buffer which will be read */ |
| size = maxdrawcount |
| ? (maxdrawcount - 1) * stride + drawElementsNumParams * sizeof(GLuint) |
| : 0; |
| |
| if (!valid_draw_indirect_elements(ctx, mode, type, |
| (void *)indirect, size, |
| "glMultiDrawElementsIndirectCountARB")) |
| return GL_FALSE; |
| |
| return valid_draw_indirect_parameters( |
| ctx, "glMultiDrawElementsIndirectCountARB", drawcount); |
| } |
| |
| static bool |
| check_valid_to_compute(struct gl_context *ctx, const char *function) |
| { |
| struct gl_shader_program *prog; |
| |
| if (!_mesa_has_compute_shaders(ctx)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "unsupported function (%s) called", |
| function); |
| return false; |
| } |
| |
| /* From the OpenGL 4.3 Core Specification, Chapter 19, Compute Shaders: |
| * |
| * "An INVALID_OPERATION error is generated if there is no active program |
| * for the compute shader stage." |
| */ |
| prog = ctx->_Shader->CurrentProgram[MESA_SHADER_COMPUTE]; |
| if (prog == NULL || prog->_LinkedShaders[MESA_SHADER_COMPUTE] == NULL) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(no active compute shader)", |
| function); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| GLboolean |
| _mesa_validate_DispatchCompute(struct gl_context *ctx, |
| const GLuint *num_groups) |
| { |
| struct gl_shader_program *prog; |
| int i; |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (!check_valid_to_compute(ctx, "glDispatchCompute")) |
| return GL_FALSE; |
| |
| for (i = 0; i < 3; i++) { |
| /* From the OpenGL 4.3 Core Specification, Chapter 19, Compute Shaders: |
| * |
| * "An INVALID_VALUE error is generated if any of num_groups_x, |
| * num_groups_y and num_groups_z are greater than or equal to the |
| * maximum work group count for the corresponding dimension." |
| * |
| * However, the "or equal to" portions appears to be a specification |
| * bug. In all other areas, the specification appears to indicate that |
| * the number of workgroups can match the MAX_COMPUTE_WORK_GROUP_COUNT |
| * value. For example, under DispatchComputeIndirect: |
| * |
| * "If any of num_groups_x, num_groups_y or num_groups_z is greater than |
| * the value of MAX_COMPUTE_WORK_GROUP_COUNT for the corresponding |
| * dimension then the results are undefined." |
| * |
| * Additionally, the OpenGLES 3.1 specification does not contain "or |
| * equal to" as an error condition. |
| */ |
| if (num_groups[i] > ctx->Const.MaxComputeWorkGroupCount[i]) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDispatchCompute(num_groups_%c)", 'x' + i); |
| return GL_FALSE; |
| } |
| } |
| |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_OPERATION error is generated by DispatchCompute if the active |
| * program for the compute shader stage has a variable work group size." |
| */ |
| prog = ctx->_Shader->CurrentProgram[MESA_SHADER_COMPUTE]; |
| if (prog->Comp.LocalSizeVariable) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glDispatchCompute(variable work group size forbidden)"); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| GLboolean |
| _mesa_validate_DispatchComputeGroupSizeARB(struct gl_context *ctx, |
| const GLuint *num_groups, |
| const GLuint *group_size) |
| { |
| struct gl_shader_program *prog; |
| GLuint total_invocations = 1; |
| int i; |
| |
| FLUSH_CURRENT(ctx, 0); |
| |
| if (!check_valid_to_compute(ctx, "glDispatchComputeGroupSizeARB")) |
| return GL_FALSE; |
| |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_OPERATION error is generated by |
| * DispatchComputeGroupSizeARB if the active program for the compute |
| * shader stage has a fixed work group size." |
| */ |
| prog = ctx->_Shader->CurrentProgram[MESA_SHADER_COMPUTE]; |
| if (!prog->Comp.LocalSizeVariable) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glDispatchComputeGroupSizeARB(fixed work group size " |
| "forbidden)"); |
| return GL_FALSE; |
| } |
| |
| for (i = 0; i < 3; i++) { |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_VALUE error is generated if any of num_groups_x, |
| * num_groups_y and num_groups_z are greater than or equal to the |
| * maximum work group count for the corresponding dimension." |
| */ |
| if (num_groups[i] > ctx->Const.MaxComputeWorkGroupCount[i]) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDispatchComputeGroupSizeARB(num_groups_%c)", 'x' + i); |
| return GL_FALSE; |
| } |
| |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_VALUE error is generated by DispatchComputeGroupSizeARB if |
| * any of <group_size_x>, <group_size_y>, or <group_size_z> is less than |
| * or equal to zero or greater than the maximum local work group size |
| * for compute shaders with variable group size |
| * (MAX_COMPUTE_VARIABLE_GROUP_SIZE_ARB) in the corresponding |
| * dimension." |
| * |
| * However, the "less than" is a spec bug because they are declared as |
| * unsigned integers. |
| */ |
| if (group_size[i] == 0 || |
| group_size[i] > ctx->Const.MaxComputeVariableGroupSize[i]) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDispatchComputeGroupSizeARB(group_size_%c)", 'x' + i); |
| return GL_FALSE; |
| } |
| |
| total_invocations *= group_size[i]; |
| } |
| |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_VALUE error is generated by DispatchComputeGroupSizeARB if |
| * the product of <group_size_x>, <group_size_y>, and <group_size_z> exceeds |
| * the implementation-dependent maximum local work group invocation count |
| * for compute shaders with variable group size |
| * (MAX_COMPUTE_VARIABLE_GROUP_INVOCATIONS_ARB)." |
| */ |
| if (total_invocations > ctx->Const.MaxComputeVariableGroupInvocations) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glDispatchComputeGroupSizeARB(product of local_sizes " |
| "exceeds MAX_COMPUTE_VARIABLE_GROUP_INVOCATIONS_ARB " |
| "(%d > %d))", total_invocations, |
| ctx->Const.MaxComputeVariableGroupInvocations); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| static GLboolean |
| valid_dispatch_indirect(struct gl_context *ctx, |
| GLintptr indirect, |
| GLsizei size, const char *name) |
| { |
| const uint64_t end = (uint64_t) indirect + size; |
| struct gl_shader_program *prog; |
| |
| if (!check_valid_to_compute(ctx, name)) |
| return GL_FALSE; |
| |
| /* From the OpenGL 4.3 Core Specification, Chapter 19, Compute Shaders: |
| * |
| * "An INVALID_VALUE error is generated if indirect is negative or is not a |
| * multiple of four." |
| */ |
| if (indirect & (sizeof(GLuint) - 1)) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "%s(indirect is not aligned)", name); |
| return GL_FALSE; |
| } |
| |
| if (indirect < 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "%s(indirect is less than zero)", name); |
| return GL_FALSE; |
| } |
| |
| /* From the OpenGL 4.3 Core Specification, Chapter 19, Compute Shaders: |
| * |
| * "An INVALID_OPERATION error is generated if no buffer is bound to the |
| * DRAW_INDIRECT_BUFFER binding, or if the command would source data |
| * beyond the end of the buffer object." |
| */ |
| if (!_mesa_is_bufferobj(ctx->DispatchIndirectBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s: no buffer bound to DISPATCH_INDIRECT_BUFFER", name); |
| return GL_FALSE; |
| } |
| |
| if (_mesa_check_disallowed_mapping(ctx->DispatchIndirectBuffer)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(DISPATCH_INDIRECT_BUFFER is mapped)", name); |
| return GL_FALSE; |
| } |
| |
| if (ctx->DispatchIndirectBuffer->Size < end) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(DISPATCH_INDIRECT_BUFFER too small)", name); |
| return GL_FALSE; |
| } |
| |
| /* The ARB_compute_variable_group_size spec says: |
| * |
| * "An INVALID_OPERATION error is generated if the active program for the |
| * compute shader stage has a variable work group size." |
| */ |
| prog = ctx->_Shader->CurrentProgram[MESA_SHADER_COMPUTE]; |
| if (prog->Comp.LocalSizeVariable) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "%s(variable work group size forbidden)", name); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| GLboolean |
| _mesa_validate_DispatchComputeIndirect(struct gl_context *ctx, |
| GLintptr indirect) |
| { |
| FLUSH_CURRENT(ctx, 0); |
| |
| return valid_dispatch_indirect(ctx, indirect, 3 * sizeof(GLuint), |
| "glDispatchComputeIndirect"); |
| } |
