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-rw-r--r--src/mesa/main/api_validate.c148
1 files changed, 81 insertions, 67 deletions
diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c
index 9c05c36d067..88a527e84cb 100644
--- a/src/mesa/main/api_validate.c
+++ b/src/mesa/main/api_validate.c
@@ -30,6 +30,55 @@
#include "state.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)
+{
+ const GLubyte *map = NULL;
+ GLuint max = 0;
+ GLint i;
+
+ if (elementBuf->Name) {
+ /* elements are in a user-defined buffer object. need to map it */
+ map = ctx->Driver.MapBuffer(ctx,
+ GL_ELEMENT_ARRAY_BUFFER_ARB,
+ GL_READ_ONLY,
+ elementBuf);
+ /* Actual address is the sum of pointers */
+ indices = (const GLvoid *) ADD_POINTERS(map, (const GLubyte *) indices);
+ }
+
+ if (type == GL_UNSIGNED_INT) {
+ for (i = 0; i < count; i++)
+ if (((GLuint *) indices)[i] > max)
+ max = ((GLuint *) indices)[i];
+ }
+ else if (type == GL_UNSIGNED_SHORT) {
+ for (i = 0; i < count; i++)
+ if (((GLushort *) indices)[i] > max)
+ max = ((GLushort *) indices)[i];
+ }
+ else {
+ ASSERT(type == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++)
+ if (((GLubyte *) indices)[i] > max)
+ max = ((GLubyte *) indices)[i];
+ }
+
+ if (map) {
+ ctx->Driver.UnmapBuffer(ctx,
+ GL_ELEMENT_ARRAY_BUFFER_ARB,
+ ctx->Array.ElementArrayBufferObj);
+ }
+
+ return max;
+}
+
+
GLboolean
_mesa_validate_DrawElements(GLcontext *ctx,
GLenum mode, GLsizei count, GLenum type,
@@ -61,21 +110,15 @@ _mesa_validate_DrawElements(GLcontext *ctx,
/* Always need vertex positions */
if (!ctx->Array.ArrayObj->Vertex.Enabled
- && !(ctx->VertexProgram._Enabled && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
+ && !(ctx->VertexProgram._Enabled
+ && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
return GL_FALSE;
/* Vertex buffer object tests */
if (ctx->Array.ElementArrayBufferObj->Name) {
- GLuint indexBytes;
-
/* use indices in the buffer object */
- if (!ctx->Array.ElementArrayBufferObj->Size) {
- _mesa_warning(ctx,
- "glDrawElements called with empty array elements buffer");
- return GL_FALSE;
- }
+ GLuint indexBytes;
- /* make sure count doesn't go outside buffer bounds */
if (type == GL_UNSIGNED_INT) {
indexBytes = count * sizeof(GLuint);
}
@@ -87,6 +130,7 @@ _mesa_validate_DrawElements(GLcontext *ctx,
indexBytes = count * sizeof(GLushort);
}
+ /* make sure count doesn't go outside buffer bounds */
if (indexBytes > ctx->Array.ElementArrayBufferObj->Size) {
_mesa_warning(ctx, "glDrawElements index out of buffer bounds");
return GL_FALSE;
@@ -100,39 +144,8 @@ _mesa_validate_DrawElements(GLcontext *ctx,
if (ctx->Const.CheckArrayBounds) {
/* find max array index */
- const GLubyte *map;
- GLuint max = 0;
- GLint i;
-
- map = ctx->Driver.MapBuffer(ctx,
- GL_ELEMENT_ARRAY_BUFFER_ARB,
- GL_READ_ONLY,
- ctx->Array.ElementArrayBufferObj);
-
- /* Actual address is the sum of pointers */
- indices = (const GLvoid *) ADD_POINTERS(map, (const GLubyte *) indices);
-
- if (type == GL_UNSIGNED_INT) {
- for (i = 0; i < count; i++)
- if (((GLuint *) indices)[i] > max)
- max = ((GLuint *) indices)[i];
- }
- else if (type == GL_UNSIGNED_SHORT) {
- for (i = 0; i < count; i++)
- if (((GLushort *) indices)[i] > max)
- max = ((GLushort *) indices)[i];
- }
- else {
- ASSERT(type == GL_UNSIGNED_BYTE);
- for (i = 0; i < count; i++)
- if (((GLubyte *) indices)[i] > max)
- max = ((GLubyte *) indices)[i];
- }
-
- ctx->Driver.UnmapBuffer(ctx,
- GL_ELEMENT_ARRAY_BUFFER_ARB,
- ctx->Array.ElementArrayBufferObj);
-
+ GLuint max = max_buffer_index(ctx, count, type, indices,
+ ctx->Array.ElementArrayBufferObj);
if (max >= ctx->Array._MaxElement) {
/* the max element is out of bounds of one or more enabled arrays */
return GL_FALSE;
@@ -179,41 +192,41 @@ _mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
/* Always need vertex positions */
if (!ctx->Array.ArrayObj->Vertex.Enabled
- && !(ctx->VertexProgram._Enabled && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
+ && !(ctx->VertexProgram._Enabled
+ && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
return GL_FALSE;
/* Vertex buffer object tests */
if (ctx->Array.ElementArrayBufferObj->Name) {
- /* XXX re-use code from above? */
+ /* use indices in the buffer object */
+ GLuint indexBytes;
+
+ if (type == GL_UNSIGNED_INT) {
+ indexBytes = count * sizeof(GLuint);
+ }
+ else if (type == GL_UNSIGNED_BYTE) {
+ indexBytes = count * sizeof(GLubyte);
+ }
+ else {
+ ASSERT(type == GL_UNSIGNED_SHORT);
+ indexBytes = count * sizeof(GLushort);
+ }
+
+ /* make sure count doesn't go outside buffer bounds */
+ if (indexBytes > ctx->Array.ElementArrayBufferObj->Size) {
+ _mesa_warning(ctx, "glDrawElements index out of buffer bounds");
+ return GL_FALSE;
+ }
}
else {
- /* not using VBO */
+ /* not using a VBO */
if (!indices)
return GL_FALSE;
}
if (ctx->Const.CheckArrayBounds) {
- /* Find max array index.
- * We don't trust the user's start and end values.
- */
- GLuint max = 0;
- GLint i;
- if (type == GL_UNSIGNED_INT) {
- for (i = 0; i < count; i++)
- if (((GLuint *) indices)[i] > max)
- max = ((GLuint *) indices)[i];
- }
- else if (type == GL_UNSIGNED_SHORT) {
- for (i = 0; i < count; i++)
- if (((GLushort *) indices)[i] > max)
- max = ((GLushort *) indices)[i];
- }
- else {
- ASSERT(type == GL_UNSIGNED_BYTE);
- for (i = 0; i < count; i++)
- if (((GLubyte *) indices)[i] > max)
- max = ((GLubyte *) indices)[i];
- }
+ GLuint max = max_buffer_index(ctx, count, type, indices,
+ ctx->Array.ElementArrayBufferObj);
if (max >= ctx->Array._MaxElement) {
/* the max element is out of bounds of one or more enabled arrays */
return GL_FALSE;
@@ -248,7 +261,8 @@ _mesa_validate_DrawArrays(GLcontext *ctx,
_mesa_update_state(ctx);
/* Always need vertex positions */
- if (!ctx->Array.ArrayObj->Vertex.Enabled && !ctx->Array.ArrayObj->VertexAttrib[0].Enabled)
+ if (!ctx->Array.ArrayObj->Vertex.Enabled
+ && !ctx->Array.ArrayObj->VertexAttrib[0].Enabled)
return GL_FALSE;
if (ctx->Const.CheckArrayBounds) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 11:07:12 +0000