graw: fix logic error in pixel format selection

The loop to choose a pixel format for the window was incrementing
'i' after we succeeded in creating the window so if we chose format[0]
for graw_create_window_and_screen() we were putting format[1] in
the pipe_resource template for creating the render target.

This only worked because of the order of the elements in the formats[]
array.

The graw_xlib.c code now properly compares the requested gallium pixel
format against the visual's color layout.

Update all the graw demos to fix the off-by-one-i error.

9 files changed, 79 insertions, 51 deletions

diff --git a/src/gallium/tests/graw/clear.c b/src/gallium/tests/graw/clear.c
index 1ff80cadee..55cc0087a0 100644
--- a/src/gallium/tests/graw/clear.c
+++ b/src/gallium/tests/graw/clear.c
@@ -2,6 +2,7 @@
  * any utility code, just the graw interface and gallium.
  */
 
+#include <stdio.h>
 #include "state_tracker/graw.h"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
@@ -48,16 +49,17 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
+   }
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
    }
-   if (window == NULL)
-      exit(2);
    
    ctx = screen->context_create(screen, NULL);
    if (ctx == NULL)
diff --git a/src/gallium/tests/graw/fs-test.c b/src/gallium/tests/graw/fs-test.c
index 37be2d0830..d21eb44e11 100644
--- a/src/gallium/tests/graw/fs-test.c
+++ b/src/gallium/tests/graw/fs-test.c
@@ -433,15 +433,18 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,WIDTH,HEIGHT,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
    }
-   
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
+   }
+
    ctx = screen->context_create(screen, NULL);
    if (ctx == NULL)
       exit(3);
diff --git a/src/gallium/tests/graw/gs-test.c b/src/gallium/tests/graw/gs-test.c
index 812666a8c8..0c65390e10 100644
--- a/src/gallium/tests/graw/gs-test.c
+++ b/src/gallium/tests/graw/gs-test.c
@@ -497,15 +497,18 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,WIDTH,HEIGHT,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
    }
-   
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
+   }
+
    ctx = screen->context_create(screen, NULL);
    if (ctx == NULL)
       exit(3);
diff --git a/src/gallium/tests/graw/quad-tex.c b/src/gallium/tests/graw/quad-tex.c
index 952131d765..58ca639d20 100644
--- a/src/gallium/tests/graw/quad-tex.c
+++ b/src/gallium/tests/graw/quad-tex.c
@@ -2,6 +2,7 @@
  * any utility code, just the graw interface and gallium.
  */
 
+#include <stdio.h>
 #include "state_tracker/graw.h"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
@@ -303,15 +304,18 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
    }
-   
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
+   }
+
    ctx = screen->context_create(screen, NULL);
    if (ctx == NULL)
       exit(3);
diff --git a/src/gallium/tests/graw/shader-leak.c b/src/gallium/tests/graw/shader-leak.c
index b53f0a046c..9af76f51ea 100644
--- a/src/gallium/tests/graw/shader-leak.c
+++ b/src/gallium/tests/graw/shader-leak.c
@@ -176,15 +176,18 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
    }
-   
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
+   }
+
    ctx = screen->context_create(screen, NULL);
    if (ctx == NULL)
       exit(3);
diff --git a/src/gallium/tests/graw/tri-gs.c b/src/gallium/tests/graw/tri-gs.c
index 84ff3e6773..a1a00b3209 100644
--- a/src/gallium/tests/graw/tri-gs.c
+++ b/src/gallium/tests/graw/tri-gs.c
@@ -2,6 +2,7 @@
  * any utility code, just the graw interface and gallium.
  */
 
+#include <stdio.h>
 #include "state_tracker/graw.h"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
@@ -182,13 +183,16 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
+   }
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
    }
    
    ctx = screen->context_create(screen, NULL);
diff --git a/src/gallium/tests/graw/tri-instanced.c b/src/gallium/tests/graw/tri-instanced.c
index f33c061b22..f61d8b9844 100644
--- a/src/gallium/tests/graw/tri-instanced.c
+++ b/src/gallium/tests/graw/tri-instanced.c
@@ -234,13 +234,16 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
+   }
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
    }
    
    ctx = screen->context_create(screen, NULL);
diff --git a/src/gallium/tests/graw/tri.c b/src/gallium/tests/graw/tri.c
index 2742c7c99e..006d61ca88 100644
--- a/src/gallium/tests/graw/tri.c
+++ b/src/gallium/tests/graw/tri.c
@@ -162,13 +162,16 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,300,300,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
+   }
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
    }
    
    ctx = screen->context_create(screen, NULL);
diff --git a/src/gallium/tests/graw/vs-test.c b/src/gallium/tests/graw/vs-test.c
index 58908f38a2..1358fa85df 100644
--- a/src/gallium/tests/graw/vs-test.c
+++ b/src/gallium/tests/graw/vs-test.c
@@ -384,13 +384,16 @@ static void init( void )
     * Also, no easy way of querying supported formats if the screen
     * cannot be created first.
     */
-   for (i = 0; 
-        window == NULL && formats[i] != PIPE_FORMAT_NONE;
-        i++) {
-      
-      screen = graw_create_window_and_screen(0,0,WIDTH,HEIGHT,
+   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+      screen = graw_create_window_and_screen(0, 0, 300, 300,
                                              formats[i],
                                              &window);
+      if (window && screen)
+         break;
+   }
+   if (!screen || !window) {
+      fprintf(stderr, "Unable to create window\n");
+      exit(1);
    }
    
    ctx = screen->context_create(screen, NULL);