[Piglit] [PATCH] getteximage-simple: Stress an i965 blitter path

[Nanley Chery]

Change the dimension of the texture to test how i965 handles having a
row pitch too large for the BLT engine.
---
 tests/texturing/getteximage-simple.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/tests/texturing/getteximage-simple.c 
b/tests/texturing/getteximage-simple.c
index 273f2b36c..9a3678acf 100644
--- a/tests/texturing/getteximage-simple.c
+++ b/tests/texturing/getteximage-simple.c
@@ -8,6 +8,10 @@
  * texture images is executed before the readback.
  *
  * This used to crash for R300+bufmgr.
+ *
+ * This also used to stress test the blit methods in i965. The BLT engine only
+ * supports pitch sizes up to but not including 32768 bytes. BLORP supports
+ * even larger sizes.
  */
 
 #include "piglit-util-gl.h"
@@ -21,19 +25,26 @@ PIGLIT_GL_TEST_CONFIG_BEGIN
 
 PIGLIT_GL_TEST_CONFIG_END
 
-static GLubyte data[4096]; /* 64*16*4 */
+#define BYTES_PER_PIXEL 4
+#define WIDTH (32768 / BYTES_PER_PIXEL)
+#define HEIGHT 2 // Ensure that the pitch is used without using too much memory
+#define IMAGE_SIZE (WIDTH * BYTES_PER_PIXEL * HEIGHT)
+
+static GLubyte data[IMAGE_SIZE];
 
 static int test_getteximage(void)
 {
-       GLubyte compare[4096];
+       GLubyte compare[IMAGE_SIZE];
        int i;
 
        glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, compare);
 
-       for(i = 0; i < 4096; ++i) {
+       for(i = 0; i < IMAGE_SIZE; ++i) {
                if (data[i] != compare[i]) {
                        printf("GetTexImage() returns incorrect data in byte 
%i\n", i);
-                       printf("    corresponding to (%i,%i) channel %i\n", i / 
64, (i / 4) % 16, i % 4);
+                       printf("    corresponding to (%i,%i) channel %i\n",
+                              i / WIDTH, (i / BYTES_PER_PIXEL) % HEIGHT,
+                              i % BYTES_PER_PIXEL);
                        printf("    expected: %i\n", data[i]);
                        printf("    got: %i\n", compare[i]);
                        return 0;
@@ -75,14 +86,14 @@ void piglit_init(int argc, char **argv)
        GLuint tex;
        int i;
 
-       for(i = 0; i < 4096; ++i)
+       for(i = 0; i < IMAGE_SIZE; ++i)
                data[i] = rand() & 0xff;
 
        glGenTextures(1, &tex);
        glBindTexture(GL_TEXTURE_2D, tex);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 64, 16, 0, GL_RGBA, 
GL_UNSIGNED_BYTE, data);
+       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, WIDTH, HEIGHT, 0, GL_RGBA, 
GL_UNSIGNED_BYTE, data);
 
        piglit_gen_ortho_projection(0.0, 1.0, 0.0, 1.0, -2.0, 6.0, GL_FALSE);
 }
-- 
2.17.0

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