#include "context.h"
#include "imports.h"
#include "mtypes.h"
-#include "state.h"
-
+#include "vbo/vbo.h"
/**
/**
* Find the max index in the given element/index buffer
*/
-static GLuint
-max_buffer_index(GLcontext *ctx, GLuint count, GLenum type,
- const void *indices,
- struct gl_buffer_object *elementBuf)
+GLuint
+_mesa_max_buffer_index(GLcontext *ctx, GLuint count, GLenum type,
+ const void *indices,
+ struct gl_buffer_object *elementBuf)
{
const GLubyte *map = NULL;
GLuint max = 0;
}
+/**
+ * Do bounds checking on array element indexes. Check that the vertices
+ * pointed to by the indices don't lie outside buffer object bounds.
+ * \return GL_TRUE if OK, GL_FALSE if any indexed vertex goes is out of bounds
+ */
+static GLboolean
+check_index_bounds(GLcontext *ctx, GLsizei count, GLenum type,
+ const GLvoid *indices, GLint basevertex)
+{
+ struct _mesa_prim prim;
+ struct _mesa_index_buffer ib;
+ GLuint min, max;
+
+ /* Only the X Server needs to do this -- otherwise, accessing outside
+ * array/BO bounds allows application termination.
+ */
+ if (!ctx->Const.CheckArrayBounds)
+ return GL_TRUE;
+
+ memset(&prim, 0, sizeof(prim));
+ prim.count = count;
+
+ memset(&ib, 0, sizeof(ib));
+ ib.type = type;
+ ib.ptr = indices;
+ ib.obj = ctx->Array.ElementArrayBufferObj;
+
+ vbo_get_minmax_index(ctx, &prim, &ib, &min, &max);
+
+ if ((int)(min + basevertex) < 0 ||
+ max + basevertex > ctx->Array.ArrayObj->_MaxElement) {
+ /* the max element is out of bounds of one or more enabled arrays */
+ _mesa_warning(ctx, "glDrawElements() index=%u is out of bounds (max=%u)",
+ max, ctx->Array.ArrayObj->_MaxElement);
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+
+
/**
* Error checking for glDrawElements(). Includes parameter checking
* and VBO bounds checking.
GLboolean
_mesa_validate_DrawElements(GLcontext *ctx,
GLenum mode, GLsizei count, GLenum type,
- const GLvoid *indices)
+ const GLvoid *indices, GLint basevertex)
{
- ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (count <= 0) {
if (count < 0)
return GL_FALSE;
}
- if (ctx->NewState)
- _mesa_update_state(ctx);
-
if (!check_valid_to_render(ctx, "glDrawElements"))
return GL_FALSE;
return GL_FALSE;
}
- if (ctx->Const.CheckArrayBounds) {
- /* find max array index */
- GLuint max = max_buffer_index(ctx, count, type, indices,
- ctx->Array.ElementArrayBufferObj);
- if (max >= ctx->Array.ArrayObj->_MaxElement) {
- /* the max element is out of bounds of one or more enabled arrays */
- _mesa_warning(ctx, "glDrawElements() index=%u is "
- "out of bounds (max=%u)", max, ctx->Array.ArrayObj->_MaxElement);
- return GL_FALSE;
- }
- }
+ if (!check_index_bounds(ctx, count, type, indices, basevertex))
+ return GL_FALSE;
return GL_TRUE;
}
_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
GLuint start, GLuint end,
GLsizei count, GLenum type,
- const GLvoid *indices)
+ const GLvoid *indices, GLint basevertex)
{
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
return GL_FALSE;
}
- if (ctx->NewState)
- _mesa_update_state(ctx);
-
if (!check_valid_to_render(ctx, "glDrawRangeElements"))
return GL_FALSE;
return GL_FALSE;
}
- if (ctx->Const.CheckArrayBounds) {
- GLuint max = max_buffer_index(ctx, count, type, indices,
- ctx->Array.ElementArrayBufferObj);
- if (max >= ctx->Array.ArrayObj->_MaxElement) {
- /* the max element is out of bounds of one or more enabled arrays */
- return GL_FALSE;
- }
- }
+ if (!check_index_bounds(ctx, count, type, indices, basevertex))
+ return GL_FALSE;
return GL_TRUE;
}
return GL_FALSE;
}
- if (ctx->NewState)
- _mesa_update_state(ctx);
-
if (!check_valid_to_render(ctx, "glDrawArrays"))
return GL_FALSE;
return GL_TRUE;
}
+
+
+GLboolean
+_mesa_validate_DrawArraysInstanced(GLcontext *ctx, GLenum mode, GLint first,
+ GLsizei count, GLsizei primcount)
+{
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+ if (count <= 0) {
+ if (count < 0)
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawArraysInstanced(count=%d)", count);
+ return GL_FALSE;
+ }
+
+ if (mode > GL_POLYGON) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glDrawArraysInstanced(mode=0x%x)", mode);
+ return GL_FALSE;
+ }
+
+ if (primcount <= 0) {
+ if (primcount < 0)
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawArraysInstanced(primcount=%d)", primcount);
+ return GL_FALSE;
+ }
+
+ if (!check_valid_to_render(ctx, "glDrawArraysInstanced(invalid to render)"))
+ return GL_FALSE;
+
+ if (ctx->CompileFlag) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawArraysInstanced(display list");
+ return GL_FALSE;
+ }
+
+ if (ctx->Const.CheckArrayBounds) {
+ if (first + count > (GLint) ctx->Array.ArrayObj->_MaxElement)
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+
+
+GLboolean
+_mesa_validate_DrawElementsInstanced(GLcontext *ctx,
+ GLenum mode, GLsizei count, GLenum type,
+ const GLvoid *indices, GLsizei primcount)
+{
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+ if (count <= 0) {
+ if (count < 0)
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawElementsInstanced(count=%d)", count);
+ return GL_FALSE;
+ }
+
+ if (mode > GL_POLYGON) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glDrawElementsInstanced(mode = 0x%x)", mode);
+ return GL_FALSE;
+ }
+
+ if (type != GL_UNSIGNED_INT &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_UNSIGNED_SHORT) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glDrawElementsInstanced(type=0x%x)", type);
+ return GL_FALSE;
+ }
+
+ if (primcount <= 0) {
+ if (primcount < 0)
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glDrawElementsInstanced(primcount=%d)", primcount);
+ return GL_FALSE;
+ }
+
+ if (!check_valid_to_render(ctx, "glDrawElementsInstanced"))
+ return GL_FALSE;
+
+ /* Vertex buffer object tests */
+ if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {
+ /* use indices in the buffer object */
+ /* make sure count doesn't go outside buffer bounds */
+ if (index_bytes(type, count) > ctx->Array.ElementArrayBufferObj->Size) {
+ _mesa_warning(ctx,
+ "glDrawElementsInstanced 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, 0))
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
projects / mesa.git / blobdiff