X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fapi_validate.c;h=071c16d1a1d8a99200a84731b1e744b68089764a;hb=7c16552f8dcc869b14cf7ef443a1b5de83b07973;hp=a3a2d2580377247dc4f5009132cf4d34ac94856f;hpb=0d5f4960a468947f9862bf5de2a71fce63b50cf7;p=mesa.git diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c index a3a2d258037..071c16d1a1d 100644 --- a/src/mesa/main/api_validate.c +++ b/src/mesa/main/api_validate.c @@ -25,136 +25,296 @@ #include #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 "vbo/vbo.h" +#include "state.h" #include "transformfeedback.h" -#include +#include "uniforms.h" +#include "vbo/vbo.h" +#include "program/prog_print.h" -/** - * \return number of bytes in array [count] of type. - */ -static GLsizei -index_bytes(GLenum type, GLsizei count) +static bool +check_blend_func_error(struct gl_context *ctx) { - if (type == GL_UNSIGNED_INT) { - return count * sizeof(GLuint); - } - else if (type == GL_UNSIGNED_BYTE) { - return count * sizeof(GLubyte); + /* 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; + } } - else { - ASSERT(type == GL_UNSIGNED_SHORT); - return count * sizeof(GLushort); + + 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_shader_program *sh_prog = + ctx->_Shader->_CurrentFragmentProgram; + const GLbitfield blend_support = !sh_prog ? 0 : + sh_prog->_LinkedShaders[MESA_SHADER_FRAGMENT]->info.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; } /** - * Find the max index in the given element/index buffer + * 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 */ -GLuint -_mesa_max_buffer_index(struct gl_context *ctx, GLuint count, GLenum type, - const void *indices, - struct gl_buffer_object *elementBuf) +GLboolean +_mesa_valid_to_render(struct gl_context *ctx, const char *where) { - const GLubyte *map = NULL; - GLuint max = 0; - GLuint i; + /* 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 (_mesa_is_bufferobj(elementBuf)) { - /* elements are in a user-defined buffer object. need to map it */ - map = ctx->Driver.MapBufferRange(ctx, 0, elementBuf->Size, - GL_MAP_READ_BIT, elementBuf, - MAP_INTERNAL); - /* Actual address is the sum of pointers */ - indices = (const GLvoid *) ADD_POINTERS(map, (const GLubyte *) indices); + 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; + } + } } - if (type == GL_UNSIGNED_INT) { - for (i = 0; i < count; i++) - if (((GLuint *) indices)[i] > max) - max = ((GLuint *) indices)[i]; + /* 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; + } } - else if (type == GL_UNSIGNED_SHORT) { - for (i = 0; i < count; i++) - if (((GLushort *) indices)[i] > max) - max = ((GLushort *) indices)[i]; + + /* 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; + } } - else { - ASSERT(type == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) - if (((GLubyte *) indices)[i] > max) - max = ((GLubyte *) indices)[i]; + + if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { + _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, + "%s(incomplete framebuffer)", where); + return GL_FALSE; } - if (map) { - ctx->Driver.UnmapBuffer(ctx, elementBuf, MAP_INTERNAL); + if (!check_blend_func_error(ctx)) { + return GL_FALSE; } - return max; +#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]->_Used + || shProg[i]->_LinkedShaders[i] == NULL) + 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]); + } + + for (i = 0; i < MESA_SHADER_STAGES; i++) { + if (shProg[i] != NULL) + shProg[i]->_Used = GL_TRUE; + } + } +#endif + + return GL_TRUE; } /** * Check if OK to draw arrays/elements. */ -static GLboolean +static bool check_valid_to_render(struct gl_context *ctx, const char *function) { if (!_mesa_valid_to_render(ctx, function)) { - return GL_FALSE; + 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). */ - if (!ctx->VertexProgram._Current) - return GL_FALSE; - break; + 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 GL_FALSE; + return false; break; case API_OPENGL_CORE: - if (ctx->Array.VAO == ctx->Array.DefaultVAO) - return GL_FALSE; - /* fallthrough */ + /* 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: - { - const struct gl_shader_program *vsProg = - ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX]; - GLboolean haveVertexShader = (vsProg && vsProg->LinkStatus); - GLboolean haveVertexProgram = ctx->VertexProgram._Enabled; - if (haveVertexShader || haveVertexProgram) { - /* Draw regardless of whether or not we have any vertex arrays. - * (Ex: could draw a point using a constant vertex pos) - */ - return GL_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); - } + 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: - assert(!"Invalid API value in check_valid_to_render()"); + unreachable("Invalid API value in check_valid_to_render()"); } - return GL_TRUE; + return true; } @@ -167,27 +327,24 @@ check_valid_to_render(struct gl_context *ctx, const char *function) bool _mesa_is_valid_prim_mode(struct gl_context *ctx, GLenum mode) { - switch (mode) { - case GL_POINTS: - case GL_LINES: - case GL_LINE_LOOP: - case GL_LINE_STRIP: - case GL_TRIANGLES: - case GL_TRIANGLE_STRIP: - case GL_TRIANGLE_FAN: + /* 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; - case GL_QUADS: - case GL_QUAD_STRIP: - case GL_POLYGON: + + if (mode <= GL_POLYGON) return (ctx->API == API_OPENGL_COMPAT); - case GL_LINES_ADJACENCY: - case GL_LINE_STRIP_ADJACENCY: - case GL_TRIANGLES_ADJACENCY: - case GL_TRIANGLE_STRIP_ADJACENCY: + + if (mode <= GL_TRIANGLE_STRIP_ADJACENCY) return _mesa_has_geometry_shaders(ctx); - default: - return false; - } + + if (mode == GL_PATCHES) + return _mesa_has_tessellation(ctx); + + return false; } @@ -196,6 +353,7 @@ _mesa_is_valid_prim_mode(struct gl_context *ctx, GLenum mode) * 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) @@ -207,7 +365,7 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) return GL_FALSE; } - /* From the ARB_geometry_shader4 spec: + /* 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: @@ -230,11 +388,32 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) * TRIANGLES_ADJACENCY_ARB and 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]->Geom.InputType; - switch (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; @@ -269,12 +448,42 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) _mesa_error(ctx, GL_INVALID_OPERATION, "%s(mode=%s vs geometry shader input %s)", name, - _mesa_lookup_prim_by_nr(mode), + _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 @@ -293,7 +502,9 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) GLboolean pass = GL_TRUE; if(ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]) { - switch (ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]->Geom.OutputType) { + switch (ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]-> + _LinkedShaders[MESA_SHADER_GEOMETRY]-> + info.Geom.OutputType) { case GL_POINTS: pass = ctx->TransformFeedback.Mode == GL_POINTS; break; @@ -307,6 +518,18 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) 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: @@ -324,10 +547,10 @@ _mesa_valid_prim_mode(struct gl_context *ctx, GLenum mode, const char *name) } 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)); + "%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; } } @@ -351,70 +574,89 @@ valid_elements_type(struct gl_context *ctx, GLenum type, const char *name) default: _mesa_error(ctx, GL_INVALID_ENUM, "%s(type = %s)", name, - _mesa_lookup_enum_by_nr(type)); + _mesa_enum_to_string(type)); return false; } } -/** - * 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, GLint basevertex) +static bool +validate_DrawElements_common(struct gl_context *ctx, + GLenum mode, GLsizei count, GLenum type, + const GLvoid *indices, + const char *caller) { - FLUSH_CURRENT(ctx, 0); - - /* From the GLES3 specification, section 2.14.2 (Transform Feedback - * Primitive Capture): + /* 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) && _mesa_is_xfb_active_and_unpaused(ctx)) { + if (_mesa_is_gles3(ctx) && !ctx->Extensions.OES_geometry_shader && + _mesa_is_xfb_active_and_unpaused(ctx)) { _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawElements(transform feedback active)"); - return GL_FALSE; + "%s(transform feedback active)", caller); + return false; } if (count < 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" ); - return GL_FALSE; + _mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", caller); + return false; } - if (!_mesa_valid_prim_mode(ctx, mode, "glDrawElements")) { - return GL_FALSE; + if (!_mesa_valid_prim_mode(ctx, mode, caller)) { + return false; } - if (!valid_elements_type(ctx, type, "glDrawElements")) - return GL_FALSE; + if (!valid_elements_type(ctx, type, caller)) + return false; - if (!check_valid_to_render(ctx, "glDrawElements")) - return GL_FALSE; + if (!check_valid_to_render(ctx, caller)) + return false; - /* Vertex buffer object tests */ - if (_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) { - /* use indices in the buffer object */ - /* make sure count doesn't go outside buffer bounds */ - if (index_bytes(type, count) > ctx->Array.VAO->IndexBufferObj->Size) { - _mesa_warning(ctx, "glDrawElements index out of buffer bounds"); - return GL_FALSE; - } - } - else { - /* not using a VBO */ - if (!indices) - return GL_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 GL_FALSE; + return false; - return GL_TRUE; + 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"); } @@ -427,7 +669,7 @@ GLboolean _mesa_validate_MultiDrawElements(struct gl_context *ctx, GLenum mode, const GLsizei *count, GLenum type, const GLvoid * const *indices, - GLuint primcount, const GLint *basevertex) + GLuint primcount) { unsigned i; @@ -451,21 +693,9 @@ _mesa_validate_MultiDrawElements(struct gl_context *ctx, if (!check_valid_to_render(ctx, "glMultiDrawElements")) return GL_FALSE; - /* Vertex buffer object tests */ - if (_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) { - /* use indices in the buffer object */ - /* make sure count doesn't go outside buffer bounds */ - for (i = 0; i < primcount; i++) { - if (index_bytes(type, count[i]) > - ctx->Array.VAO->IndexBufferObj->Size) { - _mesa_warning(ctx, - "glMultiDrawElements index out of buffer bounds"); - return GL_FALSE; - } - } - } - else { - /* not using a VBO */ + /* 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; @@ -483,91 +713,39 @@ _mesa_validate_MultiDrawElements(struct gl_context *ctx, */ GLboolean _mesa_validate_DrawRangeElements(struct gl_context *ctx, GLenum mode, - GLuint start, GLuint end, - GLsizei count, GLenum type, - const GLvoid *indices, GLint basevertex) + GLuint start, GLuint end, + GLsizei count, GLenum type, + const GLvoid *indices) { FLUSH_CURRENT(ctx, 0); - /* From the GLES3 specification, section 2.14.2 (Transform Feedback - * Primitive Capture): - * - * The error INVALID_OPERATION is also generated by DrawElements, - * DrawElementsInstanced, and DrawRangeElements while transform feedback - * is active and not paused, regardless of mode. - */ - if (_mesa_is_gles3(ctx) && _mesa_is_xfb_active_and_unpaused(ctx)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawElements(transform feedback active)"); - return GL_FALSE; - } - - if (count < 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(count)" ); - return GL_FALSE; - } - - if (!_mesa_valid_prim_mode(ctx, mode, "glDrawRangeElements")) { - return GL_FALSE; - } - if (end < start) { _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(endArray.VAO->IndexBufferObj)) { - /* use indices in the buffer object */ - /* make sure count doesn't go outside buffer bounds */ - if (index_bytes(type, count) > ctx->Array.VAO->IndexBufferObj->Size) { - _mesa_warning(ctx, "glDrawRangeElements index out of buffer bounds"); - return GL_FALSE; - } - } - else { - /* not using a VBO */ - if (!indices) - return GL_FALSE; - } - - if (count == 0) - return GL_FALSE; - - return GL_TRUE; + return validate_DrawElements_common(ctx, mode, count, type, indices, + "glDrawRangeElements"); } - -/** - * 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, GLint start, GLsizei count) +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, "glDrawArrays(count)" ); - return GL_FALSE; + _mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", func); + return false; } - if (!_mesa_valid_prim_mode(ctx, mode, "glDrawArrays")) { - return GL_FALSE; - } + if (!_mesa_valid_prim_mode(ctx, mode, func)) + return false; - if (!check_valid_to_render(ctx, "glDrawArrays")) - return GL_FALSE; + if (!check_valid_to_render(ctx, func)) + return false; /* From the GLES3 specification, section 2.14.2 (Transform Feedback * Primitive Capture): @@ -581,21 +759,48 @@ _mesa_validate_DrawArrays(struct gl_context *ctx, * * 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)) { + 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, - "glDrawArrays(exceeds transform feedback size)"); - return GL_FALSE; + "%s(exceeds transform feedback size)", func); + return false; } xfb_obj->GlesRemainingPrims -= prim_count; } if (count == 0) - return GL_FALSE; + return false; - return GL_TRUE; + 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); } @@ -603,23 +808,9 @@ GLboolean _mesa_validate_DrawArraysInstanced(struct gl_context *ctx, GLenum mode, GLint first, 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, - "glDrawArraysInstanced(count=%d)", count); - return GL_FALSE; - } - if (first < 0) { _mesa_error(ctx, GL_INVALID_VALUE, - "glDrawArraysInstanced(start=%d)", first); - return GL_FALSE; - } - - if (!_mesa_valid_prim_mode(ctx, mode, "glDrawArraysInstanced")) { + "glDrawArraysInstanced(start=%d)", first); return GL_FALSE; } @@ -630,104 +821,26 @@ _mesa_validate_DrawArraysInstanced(struct gl_context *ctx, GLenum mode, GLint fi return GL_FALSE; } - if (!check_valid_to_render(ctx, "glDrawArraysInstanced(invalid to render)")) - return GL_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. - */ - if (_mesa_is_gles3(ctx) && _mesa_is_xfb_active_and_unpaused(ctx)) { - size_t prim_count - = vbo_count_tessellated_primitives(mode, count, numInstances); - if (xfb_obj->GlesRemainingPrims < prim_count) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawArraysInstanced(exceeds transform feedback size)"); - return GL_FALSE; - } - xfb_obj->GlesRemainingPrims -= prim_count; - } - - if (count == 0) - return GL_FALSE; - - return GL_TRUE; + 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, - GLint basevertex) + const GLvoid *indices, GLsizei numInstances) { FLUSH_CURRENT(ctx, 0); - /* From the GLES3 specification, section 2.14.2 (Transform Feedback - * Primitive Capture): - * - * The error INVALID_OPERATION is also generated by DrawElements, - * DrawElementsInstanced, and DrawRangeElements while transform feedback - * is active and not paused, regardless of mode. - */ - if (_mesa_is_gles3(ctx) && _mesa_is_xfb_active_and_unpaused(ctx)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawElements(transform feedback active)"); - return GL_FALSE; - } - - if (count < 0) { + if (numInstances < 0) { _mesa_error(ctx, GL_INVALID_VALUE, - "glDrawElementsInstanced(count=%d)", count); - return GL_FALSE; - } - - if (!_mesa_valid_prim_mode(ctx, mode, "glDrawElementsInstanced")) { + "glDrawElementsInstanced(numInstances=%d)", numInstances); return GL_FALSE; } - if (!valid_elements_type(ctx, type, "glDrawElementsInstanced")) - return GL_FALSE; - - if (numInstances <= 0) { - if (numInstances < 0) - _mesa_error(ctx, GL_INVALID_VALUE, - "glDrawElementsInstanced(numInstances=%d)", numInstances); - return GL_FALSE; - } - - if (!check_valid_to_render(ctx, "glDrawElementsInstanced")) - return GL_FALSE; - - /* Vertex buffer object tests */ - if (_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) { - /* use indices in the buffer object */ - /* make sure count doesn't go outside buffer bounds */ - if (index_bytes(type, count) > ctx->Array.VAO->IndexBufferObj->Size) { - _mesa_warning(ctx, - "glDrawElementsInstanced index out of buffer bounds"); - return GL_FALSE; - } - } - else { - /* not using a VBO */ - if (!indices) - return GL_FALSE; - } - - if (count == 0) - return GL_FALSE; - - return GL_TRUE; + return validate_DrawElements_common(ctx, mode, count, type, indices, + "glDrawElementsInstanced") + && (numInstances > 0); } @@ -749,6 +862,15 @@ _mesa_validate_DrawTransformFeedback(struct gl_context *ctx, 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)"); @@ -780,18 +902,67 @@ valid_draw_indirect(struct gl_context *ctx, GLenum mode, const GLvoid *indirect, GLsizei size, const char *name) { - const GLsizeiptr end = (GLsizeiptr)indirect + size; + 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 the ARB_draw_indirect specification: - * "An INVALID_OPERATION error is generated [...] if is no - * word aligned." + /* 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_OPERATION, + _mesa_error(ctx, GL_INVALID_VALUE, "%s(indirect is not aligned)", name); return GL_FALSE; } @@ -966,3 +1137,358 @@ _mesa_validate_MultiDrawElementsIndirect(struct gl_context *ctx, 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 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 typed value + * from the buffer bound to the PARAMETER_BUFFER_ARB target at the offset + * specified by 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 , , or 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 , , and 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"); +}