scissor-bitmap: Test glScissor vs glBitmap.

6 files changed, 369 insertions, 0 deletions

diff --git a/tests/all.tests b/tests/all.tests
index 9f51b6cc5..3266af4fd 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -102,6 +102,7 @@ add_plain_test(general, 'pbo-teximage')
 add_plain_test(general, 'provoking-vertex')
 add_plain_test(general, 'oes-read-format')
 add_plain_test(general, 'read-front')
+add_plain_test(general, 'scissor-bitmap')
 add_plain_test(general, 'scissor-copypixels')
 add_plain_test(general, 'scissor-depth-clear')
 add_plain_test(general, 'scissor-many')
diff --git a/tests/general/CMakeLists.txt b/tests/general/CMakeLists.txt
index 6a65907d5..6fbf1dee6 100644
--- a/tests/general/CMakeLists.txt
+++ b/tests/general/CMakeLists.txt
@@ -37,6 +37,7 @@ add_executable (pbo-teximage pbo-teximage.c)
 add_executable (provoking-vertex provoking-vertex.c)
 add_executable (oes-read-format oes-read-format.c)
 add_executable (read-front read-front.c)
+add_executable (scissor-bitmap scissor-bitmap.c)
 add_executable (scissor-copypixels scissor-copypixels.c)
 add_executable (scissor-depth-clear scissor-depth-clear.c)
 add_executable (scissor-many scissor-many.c)
diff --git a/tests/general/scissor-bitmap.c b/tests/general/scissor-bitmap.c
new file mode 100644
index 000000000..c4fd9fa26
--- /dev/null
+++ b/tests/general/scissor-bitmap.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright © 2008 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 scissor-bitmap.c
+ *
+ * Tests that clipping of glBitmap to the backbuffer works correctly, whether
+ * it's to window boundaries or glScissor.
+ */
+
+#include "piglit-util.h"
+#include "piglit-framework.h"
+
+int piglit_width = 400;
+int piglit_height = 400;
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
+
+struct probes {
+	struct test_position {
+		const GLfloat *color;
+		const char *name;
+		int x;
+		int y;
+		int bitmap_x_off;
+		int bitmap_y_off;
+		int width;
+		int height;
+	} probes[30];
+	int n_probes;
+};
+
+static void
+add_probe(struct probes *probes,
+	  const char *name, const GLfloat *color,
+	  int x, int y, int width, int height,
+	  int bitmap_x_off, int bitmap_y_off)
+{
+	probes->probes[probes->n_probes].color = color;
+	probes->probes[probes->n_probes].name = name;
+	probes->probes[probes->n_probes].x = x;
+	probes->probes[probes->n_probes].y = y;
+	probes->probes[probes->n_probes].bitmap_x_off = bitmap_x_off;
+	probes->probes[probes->n_probes].bitmap_y_off = bitmap_y_off;
+	probes->probes[probes->n_probes].width = width;
+	probes->probes[probes->n_probes].height = height;
+	probes->n_probes++;
+}
+
+static GLboolean
+get_bitmap_bit(int x, int y)
+{
+	const uint8_t *row = &fdo_bitmap[y * fdo_bitmap_width / 8];
+
+	return (row[x / 8] >> (7 - x % 8)) & 1;
+}
+
+static GLboolean
+verify_bitmap_pixel(struct probes *probes, int i, int x, int y)
+{
+	const GLfloat black[4] = {0.0, 0.0, 0.0, 0.0};
+	int x1 = probes->probes[i].x;
+	int y1 = probes->probes[i].y;
+	int bitmap_x1 = probes->probes[i].bitmap_x_off;
+	int bitmap_y1 = probes->probes[i].bitmap_y_off;
+	const GLfloat *expected;
+	GLboolean pass;
+
+	if (probes->probes[i].color == NULL) {
+		expected = black;
+	} else {
+		GLboolean on;
+
+		on = get_bitmap_bit(x - x1 + bitmap_x1,
+				    y - y1 + bitmap_y1);
+		/* Verify that the region is black if unset, or the foreground
+		 * color otherwise.
+		 */
+		if (on)
+			expected = probes->probes[i].color;
+		else
+			expected = black;
+	}
+
+	/* Make sure the region is black */
+	pass = piglit_probe_pixel_rgb(x, y, expected);
+	if (!pass)
+		printf("glBitmap error in %s (test offset %d,%d)\n",
+		       probes->probes[i].name,
+		       x - probes->probes[i].x,
+		       y - probes->probes[i].y);
+	return pass;
+}
+
+static GLboolean
+verify_bitmap_contents(struct probes *probes, int i)
+{
+	int x, y;
+	int x1 = probes->probes[i].x;
+	int y1 = probes->probes[i].y;
+	int x2 = probes->probes[i].x + probes->probes[i].width;
+	int y2 = probes->probes[i].y + probes->probes[i].height;
+	GLboolean pass = GL_TRUE;
+
+	for (y = y1; y < y2; y++) {
+		if (y < 0 || y >= piglit_height)
+			continue;
+		for (x = x1; x < x2; x++) {
+			if (x < 0 || x >= piglit_width)
+				continue;
+
+			pass &= verify_bitmap_pixel(probes, i, x, y);
+			if (!pass)
+				return pass;
+		}
+	}
+
+	return pass;
+}
+
+enum piglit_result
+piglit_display()
+{
+	const GLfloat red[4] = {1.0, 0.0, 0.0, 0.0};
+	const GLfloat green[4] = {0.0, 1.0, 0.0, 0.0};
+	const GLfloat blue[4] = {0.0, 0.0, 1.0, 0.0};
+	int i;
+	int center_x_start = (piglit_width - fdo_bitmap_width) / 2;
+	int center_y_start = (piglit_height - fdo_bitmap_height) / 2;
+	int start_x, start_y;
+	struct probes probes;
+	GLboolean pass;
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	memset(&probes, 0, sizeof(probes));
+
+	glClearColor(0, 0, 0, 0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glColor4fv(red);
+	/* Center: full image */
+	glRasterPos2f(center_x_start, center_y_start);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "center full", red,
+		  center_x_start, center_y_start,
+		  fdo_bitmap_width, fdo_bitmap_height,
+		  0, 0);
+
+	glEnable(GL_SCISSOR_TEST);
+	glColor4fv(green);
+	/* Left clipped */
+	start_x = center_x_start - fdo_bitmap_width - 10;
+	start_y = center_y_start;
+	glScissor(start_x + fdo_bitmap_width / 4,
+		  start_y,
+		  fdo_bitmap_width,
+		  fdo_bitmap_height);
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "left glscissor clipped area", NULL,
+		  start_x, start_y,
+		  fdo_bitmap_width / 4, fdo_bitmap_height,
+		  0, 0);
+	add_probe(&probes, "left glscissor unclipped area", green,
+		  start_x + fdo_bitmap_width / 4, start_y,
+		  fdo_bitmap_width * 3 / 4, fdo_bitmap_height,
+		  fdo_bitmap_width / 4, 0);
+
+	/* Right clipped */
+	start_x = center_x_start + fdo_bitmap_width + 10;
+	start_y = center_y_start;
+	glScissor(start_x,
+		  start_y,
+		  fdo_bitmap_width * 3 / 4,
+		  fdo_bitmap_height);
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "right glscissor clipped area", NULL,
+		  start_x + fdo_bitmap_width * 3 /4,
+		  start_y,
+		  fdo_bitmap_width / 4,
+		  fdo_bitmap_height,
+		  0, 0);
+	add_probe(&probes, "right glscissor unclipped area", green,
+		  start_x, start_y,
+		  fdo_bitmap_width * 3 / 4, fdo_bitmap_height,
+		  0, 0);
+
+	/* Top clipped */
+	start_x = center_x_start;
+	start_y = center_y_start + fdo_bitmap_height + 10;
+	glScissor(start_x,
+		  start_y,
+		  fdo_bitmap_width,
+		  fdo_bitmap_height * 3 / 4);
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "top glscissor clipped area", NULL,
+		  start_x,
+		  start_y + fdo_bitmap_height * 3 /4,
+		  fdo_bitmap_width,
+		  fdo_bitmap_height / 4,
+		  0, 0);
+	add_probe(&probes, "top glscissor unclipped area", green,
+		  start_x, start_y,
+		  fdo_bitmap_width, fdo_bitmap_height * 3 / 4,
+		  0, 0);
+
+	/* Bottom clipped */
+	start_x = center_x_start;
+	start_y = center_y_start - fdo_bitmap_height - 10;
+	glScissor(start_x,
+		  start_y + fdo_bitmap_height / 4,
+		  fdo_bitmap_width,
+		  fdo_bitmap_height);
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "bottom glscissor clipped area", NULL,
+		  start_x, start_y,
+		  fdo_bitmap_width, fdo_bitmap_height / 4,
+		  0, 0);
+	add_probe(&probes, "bottom glscissor unclipped area", green,
+		  start_x, start_y + fdo_bitmap_height / 4,
+		  fdo_bitmap_width, fdo_bitmap_height * 3 / 4,
+		  0, fdo_bitmap_height / 4);
+
+	glDisable(GL_SCISSOR_TEST);
+	glColor4fv(blue);
+	/* Left side of window (not drawn due to invalid pos) */
+	start_x = -fdo_bitmap_width / 4;
+	start_y = center_y_start;
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "left window clipped area", NULL,
+		  start_x + fdo_bitmap_width / 4, start_y,
+		  fdo_bitmap_width * 3 / 4, fdo_bitmap_height,
+		  fdo_bitmap_width / 4, 0);
+	/* Right side of window */
+	start_x = piglit_width - fdo_bitmap_width * 3 / 4;
+	start_y = center_y_start;
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "right window unclipped area", blue,
+		  start_x, start_y,
+		  fdo_bitmap_width * 3 / 4, fdo_bitmap_height,
+		  0, 0);
+
+	/* Top of window */
+	start_x = center_x_start;
+	start_y = piglit_height - fdo_bitmap_height * 3 / 4;
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "top window unclipped area", blue,
+		  start_x, start_y,
+		  fdo_bitmap_width, fdo_bitmap_height * 3 / 4,
+		  0, 0);
+	/* Bottom of window (not drawn due to invalid pos) */
+	start_x = center_x_start;
+	start_y = -fdo_bitmap_height / 4;
+	glRasterPos2f(start_x, start_y);
+	glBitmap(fdo_bitmap_width, fdo_bitmap_height, 0, 0, 0, 0, fdo_bitmap);
+	add_probe(&probes, "bottom window clipped area", NULL,
+		  start_x, start_y,
+		  fdo_bitmap_width, fdo_bitmap_height * 3 / 4,
+		  0, 0);
+
+	glutSwapBuffers();
+	glFlush();
+
+	for (i = 0; i < probes.n_probes; i++) {
+		pass = pass && verify_bitmap_contents(&probes, i);
+	}
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+}
diff --git a/tests/util/CMakeLists.txt b/tests/util/CMakeLists.txt
index 809a743aa..2d036a725 100644
--- a/tests/util/CMakeLists.txt
+++ b/tests/util/CMakeLists.txt
@@ -8,6 +8,7 @@ include_directories(
 )
 
 add_library (piglitutil
+	    fdo-bitmap.c
 	    piglit-util.c
 	    shader-load.c
 	    piglit-framework.c
diff --git a/tests/util/fdo-bitmap.c b/tests/util/fdo-bitmap.c
new file mode 100644
index 000000000..34d65aea0
--- /dev/null
+++ b/tests/util/fdo-bitmap.c
@@ -0,0 +1,58 @@
+#include <stdint.h>
+const uint8_t fdo_bitmap[] = {
+	0x00, 	0x07, 	0xfc, 	0x00, 	0x00, 	0x00, 	0x00, 	0x00,
+	0x00, 	0x18, 	0x07, 	0xc0, 	0x00, 	0x00, 	0x00, 	0x00,
+	0x00, 	0x30, 	0x00, 	0x7c, 	0x00, 	0x00, 	0x00, 	0x00,
+	0x00, 	0x40, 	0x00, 	0x07, 	0x80, 	0x00, 	0x00, 	0x00,
+	0x00, 	0x83, 	0xfc, 	0x00, 	0x78, 	0x00, 	0x00, 	0x00,
+	0x01, 	0x87, 	0xff, 	0xc0, 	0x07, 	0x80, 	0x00, 	0x00,
+	0x01, 	0x0f, 	0xff, 	0xfc, 	0x00, 	0xf8, 	0x00, 	0x00,
+	0x03, 	0x1f, 	0xff, 	0xff, 	0xc0, 	0x0f, 	0x80, 	0x00,
+	0x02, 	0x3f, 	0xff, 	0xff, 	0xfc, 	0x00, 	0xf8, 	0x00,
+	0x02, 	0x3f, 	0xff, 	0xff, 	0xff, 	0xc0, 	0x0f, 	0x00,
+	0x02, 	0x7f, 	0xff, 	0xff, 	0xff, 	0xf8, 	0x03, 	0xc0,
+	0x04, 	0x7f, 	0xff, 	0xfe, 	0xff, 	0xff, 	0x80, 	0x30,
+	0x04, 	0x7f, 	0xff, 	0xfc, 	0x1f, 	0xff, 	0xf8, 	0x18,
+	0x04, 	0x7f, 	0xff, 	0xfc, 	0x03, 	0xff, 	0xfe, 	0x08,
+	0x04, 	0xff, 	0xff, 	0xf8, 	0x07, 	0xff, 	0xff, 	0x84,
+	0x08, 	0xff, 	0xff, 	0xf8, 	0x07, 	0xff, 	0xff, 	0xc6,
+	0x08, 	0xff, 	0xff, 	0xfc, 	0x07, 	0xff, 	0xff, 	0xc2,
+	0x08, 	0xff, 	0xff, 	0xff, 	0x8f, 	0xff, 	0xff, 	0xe2,
+	0x19, 	0xff, 	0xff, 	0xf7, 	0xff, 	0xff, 	0xff, 	0xe3,
+	0x11, 	0xff, 	0xff, 	0xe3, 	0xff, 	0xff, 	0xff, 	0xe1,
+	0x11, 	0xff, 	0xff, 	0xc7, 	0xf1, 	0xff, 	0xff, 	0xf1,
+	0x11, 	0xff, 	0xff, 	0x8f, 	0xf9, 	0xff, 	0xff, 	0xf3,
+	0x33, 	0xff, 	0xff, 	0x1f, 	0xf8, 	0xff, 	0xff, 	0xe3,
+	0x23, 	0xf1, 	0xfe, 	0x3f, 	0xfc, 	0x7f, 	0xff, 	0xe2,
+	0x23, 	0xf0, 	0x1f, 	0xff, 	0xfe, 	0x7f, 	0xff, 	0xe2,
+	0x23, 	0xe0, 	0x01, 	0xff, 	0xfe, 	0x3f, 	0xff, 	0xe2,
+	0x67, 	0xe0, 	0x00, 	0x3f, 	0xff, 	0x7f, 	0xff, 	0xe4,
+	0x47, 	0xe0, 	0x00, 	0x3f, 	0xff, 	0xff, 	0xff, 	0xc4,
+	0x47, 	0xe0, 	0x00, 	0x3f, 	0xff, 	0x87, 	0xff, 	0xc4,
+	0x47, 	0xc0, 	0x00, 	0x3f, 	0xff, 	0x80, 	0x7f, 	0xcc,
+	0x4f, 	0xc0, 	0x00, 	0x61, 	0xff, 	0x00, 	0x0f, 	0xc8,
+	0x8f, 	0xc0, 	0x00, 	0x60, 	0x03, 	0x00, 	0x0f, 	0x88,
+	0x8f, 	0xc0, 	0x00, 	0x78, 	0x03, 	0x00, 	0x0f, 	0x88,
+	0xc7, 	0xc0, 	0x00, 	0xff, 	0xff, 	0x00, 	0x0f, 	0x98,
+	0x47, 	0xf0, 	0x00, 	0xff, 	0xfe, 	0x00, 	0x0f, 	0x10,
+	0x47, 	0xff, 	0x00, 	0xff, 	0xfe, 	0x00, 	0x1f, 	0x10,
+	0x43, 	0xff, 	0xe0, 	0xff, 	0xff, 	0x00, 	0x1f, 	0x10,
+	0x21, 	0xff, 	0xff, 	0xff, 	0xff, 	0xf0, 	0x1f, 	0x30,
+	0x30, 	0xff, 	0xff, 	0xff, 	0xff, 	0xff, 	0x3e, 	0x20,
+	0x18, 	0x3f, 	0xff, 	0xff, 	0xff, 	0xff, 	0xfe, 	0x20,
+	0x0c, 	0x03, 	0xff, 	0xff, 	0xff, 	0xff, 	0xfe, 	0x20,
+	0x07, 	0x00, 	0x7f, 	0xff, 	0xff, 	0xff, 	0xfe, 	0x60,
+	0x01, 	0xe0, 	0x07, 	0xff, 	0xff, 	0xff, 	0xfc, 	0x40,
+	0x00, 	0x3e, 	0x00, 	0x7f, 	0xff, 	0xff, 	0xfc, 	0x40,
+	0x00, 	0x03, 	0xc0, 	0x07, 	0xff, 	0xff, 	0xf8, 	0x40,
+	0x00, 	0x00, 	0x3c, 	0x00, 	0x7f, 	0xff, 	0xf8, 	0x80,
+	0x00, 	0x00, 	0x03, 	0xc0, 	0x07, 	0xff, 	0xf0, 	0x80,
+	0x00, 	0x00, 	0x00, 	0x7c, 	0x00, 	0xff, 	0xc1, 	0x00,
+	0x00, 	0x00, 	0x00, 	0x07, 	0xc0, 	0x00, 	0x03, 	0x00,
+	0x00, 	0x00, 	0x00, 	0x00, 	0x7c, 	0x00, 	0x06, 	0x00,
+	0x00, 	0x00, 	0x00, 	0x00, 	0x07, 	0x80, 	0x18, 	0x00,
+	0x00, 	0x00, 	0x00, 	0x00, 	0x00, 	0x7f, 	0xf0, 	0x00,
+	0x00, 	0x00, 	0x00, 	0x00, 	0x00, 	0x07, 	0x00, 	0x00,
+};
+const unsigned int fdo_bitmap_width = 64;
+const unsigned int fdo_bitmap_height = 53;
diff --git a/tests/util/piglit-util.h b/tests/util/piglit-util.h
index 36307e7ee..c694caead 100644
--- a/tests/util/piglit-util.h
+++ b/tests/util/piglit-util.h
@@ -68,6 +68,10 @@ enum piglit_result {
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 
+extern const uint8_t fdo_bitmap[];
+extern const unsigned int fdo_bitmap_width;
+extern const unsigned int fdo_bitmap_height;
+
 int FindLine(const char *program, int position);
 void piglit_report_result(enum piglit_result result);
 void piglit_require_extension(const char *name);