fbo-blit: also test glCopyPixels and glRead/DrawPixels()

But these new tests are temporarily disabled until some bugs in
Mesa are fixed (so the test acts exactly as it did before).

1 files changed, 95 insertions, 18 deletions

diff --git a/tests/fbo/fbo-blit.c b/tests/fbo/fbo-blit.c
index 5f4c7f0f0..40259c318 100644
--- a/tests/fbo/fbo-blit.c
+++ b/tests/fbo/fbo-blit.c
@@ -22,7 +22,7 @@
  *
  * Authors:
  *    Eric Anholt <eric@anholt.net>
- *
+ *    Brian Paul
  */
 
 /** @file fbo-blit.c
@@ -30,6 +30,8 @@
  * Tests EXT_framebuffer_blit with various combinations of window system and
  * FBO objects.  Because FBOs are generally stored inverted relative to
  * window system frambuffers, this could catch flipping failures in blit paths.
+ *
+ * Brian added testing of glCopy/Read/DrawPixels().
  */
 
 #include "piglit-util.h"
@@ -44,6 +46,30 @@ int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
 #define FBO_SIZE 64
 
 
+enum copy_method {
+	COPY_PIXELS,
+	READ_DRAW_PIXELS,
+	BLIT_PIXELS
+};
+
+
+static const char *
+method_name(enum copy_method method)
+{
+	switch (method) {
+	case COPY_PIXELS:
+		return "glCopyPixels";
+	case READ_DRAW_PIXELS:
+		return "glReadPixels + glCopyPixels";
+	case BLIT_PIXELS:
+		return "glBlitFramebuffer";
+	default:
+		assert(0 && "bad copy method");
+		return NULL;
+	}
+}
+			
+
 static GLuint
 make_fbo(int w, int h)
 {
@@ -128,8 +154,45 @@ verify_color_rect(int start_x, int start_y, int w, int h)
 	return GL_TRUE;
 }
 
-enum piglit_result
-piglit_display(void)
+
+static void
+copy(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+     GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+     enum copy_method method)
+{
+	if (method == COPY_PIXELS) {
+		GLsizei srcW = srcX1 - srcX0, srcH = srcY1 - srcY0;
+		GLsizei dstW = dstX1 - dstX0, dstH = dstY1 - dstY0;
+		glPixelZoom((float) dstW / (float) srcW,
+			    (float) dstH / (float) srcH);
+		glWindowPos2i(dstX0, dstY0);
+		glCopyPixels(srcX0, srcY0, srcW, srcH, GL_COLOR);
+	}
+	else if (method == READ_DRAW_PIXELS) {
+		GLsizei srcW = srcX1 - srcX0, srcH = srcY1 - srcY0;
+		GLsizei dstW = dstX1 - dstX0, dstH = dstY1 - dstY0;
+		void *buf = malloc(srcW * srcH * 4);
+		glReadPixels(srcX0, srcY0, srcW, srcH,
+			     GL_RGBA, GL_UNSIGNED_BYTE, buf);
+		glPixelZoom((float) dstW / (float) srcW,
+			    (float) dstH / (float) srcH);
+		glWindowPos2i(dstX0, dstY0);
+		glDrawPixels(srcW, srcH, GL_RGBA, GL_UNSIGNED_BYTE, buf);
+		free(buf);
+	}
+	else if (method == BLIT_PIXELS) {
+		glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1,
+				     dstX0, dstY0, dstX1, dstY1,
+				     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+	}
+	else {
+		assert(0 && "invalid copy method");
+	}
+}
+
+
+static GLboolean
+run_test(enum copy_method method)
 {
 	GLboolean pass = GL_TRUE;
 	GLuint fbo;
@@ -166,29 +229,23 @@ piglit_display(void)
 	 */
 	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0);
 	glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, fbo);
-	glBlitFramebufferEXT(x0, y0,
-			     x0 + SIZE, y0 + SIZE,
-			     x0, y1,
-			     x0 + SIZE, y1 + SIZE,
-			     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ 	copy(x0, y0, x0 + SIZE, y0 + SIZE,
+ 	     x0, y1, x0 + SIZE, y1 + SIZE,
+ 	     method);
 
 	/* WIN -> FBO */
 	glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
 	glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
-	glBlitFramebufferEXT(PAD, PAD,
-			     PAD + SIZE, PAD + SIZE,
-			     PAD, PAD * 2 + SIZE,
-			     PAD + SIZE, (PAD * 2 + SIZE) + SIZE,
-			     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ 	copy(x0, y0, x0 + SIZE, y0 + SIZE,
+ 	     x0, y1, x0 + SIZE, y1 + SIZE,
+ 	     method);
 
 	/* FBO(middle) -> WIN(top) back to verify WIN -> FBO */
 	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0);
 	glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, fbo);
-	glBlitFramebufferEXT(x0, y1,
-			     x0 + SIZE, y1 + SIZE,
-			     x0, y2,
-			     x0 + SIZE, y2 + SIZE,
-			     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ 	copy(x0, y1, x0 + SIZE, y1 + SIZE,
+ 	     x0, y2, x0 + SIZE, y2 + SIZE,
+ 	     method);
 
 	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0);
 	glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
@@ -197,11 +254,31 @@ piglit_display(void)
 	pass = verify_color_rect(PAD, y1, SIZE, SIZE) && pass;
 	pass = verify_color_rect(PAD, y2, SIZE, SIZE) && pass;
 
+	if (!pass) {
+		printf("fbo-blit: failure for %s\n", method_name(method));
+	}
+
 	glutSwapBuffers();
 
+	return pass;
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+
+#if 0 /* enable after fixing some Mesa bugs */
+	pass = pass && run_test(COPY_PIXELS);
+	pass = pass && run_test(READ_DRAW_PIXELS);
+#endif
+	pass = pass && run_test(BLIT_PIXELS);
+
 	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
 }
 
+
 void
 piglit_init(int argc, char **argv)
 {