X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fapi_validate.c;h=ae3e118f426a084044646b4c5b1abf4454ee9353;hb=72f1566f90c434c7752d8405193eec68d6743246;hp=869dc4ee47a38dddbd1c8b7603920ece2ac1d6e5;hpb=d5f936367ffbec5833e5eb7cf22666e38c8e3821;p=mesa.git diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c index 869dc4ee47a..ae3e118f426 100644 --- a/src/mesa/main/api_validate.c +++ b/src/mesa/main/api_validate.c @@ -25,6 +25,7 @@ #include #include "glheader.h" #include "api_validate.h" +#include "arrayobj.h" #include "bufferobj.h" #include "context.h" #include "imports.h" @@ -48,15 +49,13 @@ check_valid_to_render(struct gl_context *ctx, const char *function) switch (ctx->API) { case API_OPENGLES2: /* For ES2, we can draw if we have a vertex program/shader). */ - if (!ctx->VertexProgram._Current) - return 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 false; + return false; break; case API_OPENGL_CORE: @@ -71,6 +70,25 @@ check_valid_to_render(struct gl_context *ctx, const char *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: * @@ -83,13 +101,8 @@ check_valid_to_render(struct gl_context *ctx, const char *function) */ return ctx->VertexProgram._Current != NULL; - case API_OPENGL_COMPAT: { - const struct gl_shader_program *const vsProg = - ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX]; - const bool haveVertexShader = (vsProg && vsProg->LinkStatus); - const bool haveVertexProgram = ctx->VertexProgram._Enabled; - - if (haveVertexShader || haveVertexProgram) { + 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) */ @@ -102,12 +115,17 @@ check_valid_to_render(struct gl_context *ctx, const char *function) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_GENERIC0].Enabled); } break; - } default: unreachable("Invalid API value in check_valid_to_render()"); } + if (!_mesa_all_buffers_are_unmapped(ctx->Array.VAO)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(vertex buffers are mapped)", function); + return false; + } + return true; } @@ -121,27 +139,24 @@ 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; } @@ -150,6 +165,7 @@ _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) @@ -161,7 +177,7 @@ _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: @@ -184,11 +200,32 @@ _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; @@ -223,12 +260,42 @@ _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 @@ -247,7 +314,9 @@ _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; @@ -261,6 +330,18 @@ _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: @@ -278,10 +359,10 @@ _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; } } @@ -305,7 +386,7 @@ 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; } } @@ -323,7 +404,8 @@ validate_DrawElements_common(struct gl_context *ctx, * 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)) { + 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; @@ -362,8 +444,8 @@ validate_DrawElements_common(struct gl_context *ctx, */ GLboolean _mesa_validate_DrawElements(struct gl_context *ctx, - GLenum mode, GLsizei count, GLenum type, - const GLvoid *indices) + GLenum mode, GLsizei count, GLenum type, + const GLvoid *indices) { FLUSH_CURRENT(ctx, 0); @@ -425,9 +507,9 @@ _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) + GLuint start, GLuint end, + GLsizei count, GLenum type, + const GLvoid *indices) { FLUSH_CURRENT(ctx, 0); @@ -440,30 +522,24 @@ _mesa_validate_DrawRangeElements(struct gl_context *ctx, GLenum mode, "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, 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): @@ -477,21 +553,48 @@ _mesa_validate_DrawArrays(struct gl_context *ctx, GLenum mode, GLsizei count) * * 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); } @@ -499,23 +602,9 @@ 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; } @@ -526,37 +615,7 @@ _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); } @@ -597,6 +656,15 @@ _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)"); @@ -628,18 +696,56 @@ 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." + */ + 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; } @@ -814,3 +920,249 @@ _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) +{ + 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; + } + } + + 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; + + 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; + } + + 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"); +}