#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 "vbo/vbo.h"
+#include "state.h"
#include "transformfeedback.h"
-#include <stdbool.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;
+}
/**
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). */
/* 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:
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:
*
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:
* 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]->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;
_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;
}
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;
else if (ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL]) {
struct gl_shader_program *tes =
ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL];
-
- if (tes->TessEval.PointMode)
+ 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->TessEval.PrimitiveMode == GL_ISOLINES)
+ else if (tes_sh->info.TessEval.PrimitiveMode == GL_ISOLINES)
pass = ctx->TransformFeedback.Mode == GL_LINES;
else
pass = ctx->TransformFeedback.Mode == GL_TRIANGLES;
}
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;
+ }
+ }
+
+ /* 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;
}
}
const GLvoid *indices,
const char *caller)
{
- /* 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,
"%s(transform feedback active)", caller);
return false;
*/
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);
*/
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);
"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):
*
* 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);
}
_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;
}
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);
}
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)");
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 <indirect> 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;
}
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");
+}
projects / mesa.git / blobdiff