fbo-blit: New test for EXT_framebuffer_blitting around between win/fbo.

3 files changed, 205 insertions, 0 deletions

diff --git a/tests/all.tests b/tests/all.tests
index eb9792233..0ef362080 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -67,6 +67,7 @@ add_plain_test(mesa, 'crossbar')
 fbo = Group()
 add_plain_test(fbo, 'fbo-1d')
 add_plain_test(fbo, 'fbo-3d')
+add_plain_test(fbo, 'fbo-blit')
 add_plain_test(fbo, 'fbo-cubemap')
 add_plain_test(fbo, 'fbo-clearmipmap')
 add_plain_test(fbo, 'fbo-copyteximage')
diff --git a/tests/fbo/CMakeLists.txt b/tests/fbo/CMakeLists.txt
index e28ecf75d..349cf1d96 100644
--- a/tests/fbo/CMakeLists.txt
+++ b/tests/fbo/CMakeLists.txt
@@ -23,6 +23,7 @@ link_libraries (
 
 add_executable (fbo-1d fbo-1d.c)
 add_executable (fbo-3d fbo-3d.c)
+add_executable (fbo-blit fbo-blit.c)
 add_executable (fbo-clearmipmap fbo-clearmipmap.c)
 add_executable (fbo-drawbuffers fbo-drawbuffers.c)
 add_executable (fbo-drawbuffers2-blend fbo-drawbuffers2-blend.c)
diff --git a/tests/fbo/fbo-blit.c b/tests/fbo/fbo-blit.c
new file mode 100644
index 000000000..883c92647
--- /dev/null
+++ b/tests/fbo/fbo-blit.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * 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.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/** @file fbo-blit.c
+ *
+ * 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.
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 100;
+int piglit_height = 100;
+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
+#define PAD 10
+#define SIZE 20
+
+static GLuint
+make_fbo(int w, int h)
+{
+	GLuint tex;
+	GLuint fb;
+ 	GLenum status;
+
+	glGenFramebuffersEXT(1, &fb);
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+		     w, h, 0,
+		     GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+				  GL_COLOR_ATTACHMENT0_EXT,
+				  GL_TEXTURE_2D,
+				  tex,
+				  0);
+	assert(glGetError() == 0);
+
+	status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
+	if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+		fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
+		piglit_report_result(PIGLIT_SKIP);
+	}
+
+	return fb;
+}
+
+static void
+draw_color_rect(int x, int y, int w, int h)
+{
+	int x1 = x;
+	int x2 = x + w / 2;
+	int y1 = y;
+	int y2 = y + h / 2;
+
+	glColor4f(1.0, 0.0, 0.0, 0.0);
+	piglit_draw_rect(x1, y1, w / 2, h / 2);
+	glColor4f(0.0, 1.0, 0.0, 0.0);
+	piglit_draw_rect(x2, y1, w / 2, h / 2);
+	glColor4f(0.0, 0.0, 1.0, 0.0);
+	piglit_draw_rect(x1, y2, w / 2, h / 2);
+	glColor4f(1.0, 1.0, 1.0, 0.0);
+	piglit_draw_rect(x2, y2, w / 2, h / 2);
+}
+
+static GLboolean
+verify_color_rect(int start_x, int start_y, int w, int h)
+{
+	float red[] =   {1, 0, 0, 0};
+	float green[] = {0, 1, 0, 0};
+	float blue[] =  {0, 0, 1, 0};
+	float white[] = {1, 1, 1, 0};
+	int x, y;
+
+	for (y = 0; y < h; y++) {
+		for (x = 0; x < w; x++) {
+			float *expected;
+
+			if ((y < h / 2) && (x < w / 2))
+				expected = red;
+			else if (y < h / 2)
+				expected = green;
+			else if (x < w / 2)
+				expected = blue;
+			else
+				expected = white;
+
+			if (!piglit_probe_pixel_rgb(start_x + x, start_y + y,
+						    expected))
+				return GL_FALSE;
+		}
+	}
+
+	return GL_TRUE;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+	GLuint fb;
+	int fbo_width = PAD * 2 + SIZE;
+	int fbo_height = PAD * 3 + SIZE * 2;
+
+	glViewport(0, 0, piglit_width, piglit_height);
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	glClearColor(0.5, 0.5, 0.5, 0.5);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Draw the color rect in the window system */
+	draw_color_rect(PAD, PAD, SIZE, SIZE);
+
+	fb = make_fbo((PAD + SIZE) * 2, (PAD + SIZE) * 2);
+
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, fb);
+	glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, 0);
+	glViewport(0, 0, fbo_width, fbo_height);
+	piglit_ortho_projection(fbo_width, fbo_height, GL_FALSE);
+	glClearColor(1.0, 0.0, 1.0, 0.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Draw the color rect in the FBO */
+	draw_color_rect(PAD, PAD, SIZE, SIZE);
+
+	/* Now that we have correct samples, blit things around.
+	 * FB -> WIN
+	 */
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0);
+	glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, fb);
+	glBlitFramebufferEXT(PAD, PAD,
+			     PAD + SIZE, PAD + SIZE,
+			     PAD, PAD * 2 + SIZE,
+			     PAD + SIZE, (PAD * 2 + SIZE) + SIZE,
+			     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+
+	/* WIN -> FB */
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, fb);
+	glBindFramebuffer(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);
+
+	/* FB -> WIN back to verify WIN -> FB */
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0);
+	glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, fb);
+	glBlitFramebufferEXT(PAD, PAD * 2 + SIZE,
+			     PAD + SIZE, (PAD * 2 + SIZE) + SIZE,
+			     PAD, PAD * 3 + SIZE * 2,
+			     PAD + SIZE, (PAD * 3 + SIZE * 2) + SIZE,
+			     GL_COLOR_BUFFER_BIT, GL_NEAREST);
+
+	glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
+
+	pass = verify_color_rect(PAD, PAD, SIZE, SIZE) && pass;
+	pass = verify_color_rect(PAD, PAD * 2 + SIZE, SIZE, SIZE) && pass;
+	pass = verify_color_rect(PAD, PAD * 3 + SIZE * 2, SIZE, SIZE) && pass;
+
+	glutSwapBuffers();
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	piglit_require_extension("GL_EXT_framebuffer_object");
+	piglit_require_extension("GL_EXT_framebuffer_blit");
+}