/**
* Error checking for glMultiDrawElements(). Includes parameter checking
* and VBO bounds checking.
* \return GL_TRUE if OK to render, GL_FALSE if error found
*/
GLboolean
_mesa_validate_MultiDrawElements(struct gl_context *ctx,
GLenum mode, const GLsizei *count,
GLenum type, const GLvoid * const *indices,
GLuint primcount, const GLint *basevertex)
{
unsigned i;
FLUSH_CURRENT(ctx, 0);
for (i = 0; i < primcount; i++) {
if (count[i] <= 0) {
if (count[i] < 0)
_mesa_error(ctx, GL_INVALID_VALUE,
"glMultiDrawElements(count)" );
return GL_FALSE;
}
}
if (!_mesa_valid_prim_mode(ctx, mode, "glMultiDrawElements")) {
return GL_FALSE;
}
if (!valid_elements_type(ctx, type, "glMultiDrawElements"))
return GL_FALSE;
if (!check_valid_to_render(ctx, "glMultiDrawElements"))
return GL_FALSE;
/* Vertex buffer object tests */
if (_mesa_is_bufferobj(ctx->Array.ArrayObj->ElementArrayBufferObj)) {
/* 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.ArrayObj->ElementArrayBufferObj->Size) {
_mesa_warning(ctx,
"glMultiDrawElements index out of buffer bounds");
return GL_FALSE;
}
}
}
else {
/* not using a VBO */
for (i = 0; i < primcount; i++) {
if (!indices[i])
return GL_FALSE;
}
}
for (i = 0; i < primcount; i++) {
if (!check_index_bounds(ctx, count[i], type, indices[i],
basevertex ? basevertex[i] : 0))
return GL_FALSE;
}
return GL_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, GLint basevertex)
{
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 (count < 0)
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
return GL_FALSE;
}
if (!_mesa_valid_prim_mode(ctx, mode, "glDrawElements")) {
return GL_FALSE;
}
if (!valid_elements_type(ctx, type, "glDrawElements"))
return GL_FALSE;
if (!check_valid_to_render(ctx, "glDrawElements"))
return GL_FALSE;
/* Vertex buffer object tests */
if (_mesa_is_bufferobj(ctx->Array.ArrayObj->ElementArrayBufferObj)) {
/* use indices in the buffer object */
/* make sure count doesn't go outside buffer bounds */
if (index_bytes(type, count) > ctx->Array.ArrayObj->ElementArrayBufferObj->Size) {
_mesa_warning(ctx, "glDrawElements index out of buffer bounds");
return GL_FALSE;
}
}
else {
/* not using a VBO */
if (!indices)
return GL_FALSE;
}
if (!check_index_bounds(ctx, count, type, indices, basevertex))
return GL_FALSE;
return GL_TRUE;
}
static bool
validate_DrawElements_common(struct gl_context *ctx,
GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices,
const char *caller)
{
/* 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) && !ctx->Extensions.OES_geometry_shader &&
_mesa_is_xfb_active_and_unpaused(ctx)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(transform feedback active)", caller);
return false;
}
if (count < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", caller);
return false;
}
if (!_mesa_valid_prim_mode(ctx, mode, caller)) {
return false;
}
if (!valid_elements_type(ctx, type, caller))
return false;
if (!check_valid_to_render(ctx, caller))
return false;
/* Not using a VBO for indices, so avoid NULL pointer derefs later.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj) && indices == NULL)
return false;
if (count == 0)
return false;
return true;
}
static inline GLboolean
valid_draw_indirect_elements(struct gl_context *ctx,
GLenum mode, GLenum type, const GLvoid *indirect,
GLsizeiptr size, const char *name)
{
if (!valid_elements_type(ctx, type, name))
return GL_FALSE;
/*
* Unlike regular DrawElementsInstancedBaseVertex commands, the indices
* may not come from a client array and must come from an index buffer.
* If no element array buffer is bound, an INVALID_OPERATION error is
* generated.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(no buffer bound to GL_ELEMENT_ARRAY_BUFFER)", name);
return GL_FALSE;
}
return valid_draw_indirect(ctx, mode, indirect, size, name);
}
/**
* Error checking for glMultiDrawElements(). Includes parameter checking
* and VBO bounds checking.
* \return GL_TRUE if OK to render, GL_FALSE if error found
*/
GLboolean
_mesa_validate_MultiDrawElements(struct gl_context *ctx,
GLenum mode, const GLsizei *count,
GLenum type, const GLvoid * const *indices,
GLuint primcount)
{
unsigned i;
FLUSH_CURRENT(ctx, 0);
for (i = 0; i < primcount; i++) {
if (count[i] < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glMultiDrawElements(count)" );
return GL_FALSE;
}
}
if (!_mesa_valid_prim_mode(ctx, mode, "glMultiDrawElements")) {
return GL_FALSE;
}
if (!valid_elements_type(ctx, type, "glMultiDrawElements"))
return GL_FALSE;
if (!check_valid_to_render(ctx, "glMultiDrawElements"))
return GL_FALSE;
/* Not using a VBO for indices, so avoid NULL pointer derefs later.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) {
for (i = 0; i < primcount; i++) {
if (!indices[i])
return GL_FALSE;
}
}
return GL_TRUE;
}
static bool
validate_DrawElements_common(struct gl_context *ctx,
GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices,
const char *caller)
{
/* Section 2.14.2 (Transform Feedback Primitive Capture) of the OpenGL ES
* 3.1 spec says:
*
* The error INVALID_OPERATION is also generated by DrawElements,
* DrawElementsInstanced, and DrawRangeElements while transform feedback
* is active and not paused, regardless of mode.
*
* The OES_geometry_shader_spec says:
*
* Issues:
*
* ...
*
* (13) Does this extension change how transform feedback operates
* compared to unextended OpenGL ES 3.0 or 3.1?
*
* RESOLVED: Yes... Since we no longer require being able to predict how
* much geometry will be generated, we also lift the restriction that
* only DrawArray* commands are supported and also support the
* DrawElements* commands for transform feedback.
*
* This should also be reflected in the body of the spec, but that appears
* to have been overlooked. The body of the spec only explicitly allows
* the indirect versions.
*/
if (_mesa_is_gles3(ctx) && !ctx->Extensions.OES_geometry_shader &&
_mesa_is_xfb_active_and_unpaused(ctx)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(transform feedback active)", caller);
return false;
}
if (count < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(count)", caller);
return false;
}
if (!_mesa_valid_prim_mode(ctx, mode, caller)) {
return false;
}
if (!valid_elements_type(ctx, type, caller))
return false;
if (!check_valid_to_render(ctx, caller))
return false;
/* Not using a VBO for indices, so avoid NULL pointer derefs later.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj) && indices == NULL)
return false;
if (count == 0)
return false;
return true;
}
