vbo-buffer-unmap: exercise a VBO buffer unmap issue

tests/bugs/CMakeLists.txt

@@ -40,3 +40,4 @@ add_executable (fdo25614-genmipmap fdo25614-genmipmap.c)
 add_executable (fdo28551 fdo28551.c)
 add_executable (fdo31934 fdo31934.c)
 add_executable (tri-tex-crash tri-tex-crash.c)
+add_executable (vbo-buffer-unmap vbo-buffer-unmap.c)

tests/bugs/vbo-buffer-unmap.c

+/*
+ * Copyright (c) 2011 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/**
+ * Test that the VBO's buffers are unmapped before drawing.
+ * In particular, test the VMware svga Gallium driver.
+ *
+ * Brian Paul
+ * 18 Feb 2011
+ */
+
+
+#include "piglit-util.h"
+#include "piglit-framework.h"
+
+
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
+int piglit_width = 100, piglit_height = 100;
+
+
+enum piglit_result
+piglit_display(void)
+{
+   GLubyte image[8][8][4];
+   GLuint tex;
+
+   memset(image, 0x80, sizeof(image));
+
+   glGenTextures(1, &tex);
+   glBindTexture(GL_TEXTURE_2D, tex);
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glColor3f(0, 1, 0);
+
+   glBegin(GL_POINTS);
+   glVertex2f(-1, 0);
+   glEnd();
+   glBegin(GL_POINTS);
+   glVertex2f(0, 0);
+   glEnd();
+   glBegin(GL_POINTS);
+   glVertex2f(1, 0);
+   glEnd();
+
+   glFlush();
+
+   /* This call may cause a the internal VBO to be mapped and the
+    * glTexImage2D call which may do a DMA transfer may hit a path
+    * where we expect all VBOs to be unmapped.
+    */
+   glColor3f(1, 0, 0);
+
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+
+   glutSwapBuffers();
+
+   return PIGLIT_SUCCESS;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-2, 2, -2, 2, -1, 1);
+}