fbo-clear-formats: New test for glClear to FBO texture formats.

This could use some polishing to support formats not included in the
965 driver (currently disabled in all.tests since I haven't tested the
test on them), but it's proved useful in catching bugs so far.

1 files changed, 517 insertions, 0 deletions

diff --git a/tests/fbo/fbo-clear-formats.c b/tests/fbo/fbo-clear-formats.c
new file mode 100644
index 000000000..23656f50c
--- /dev/null
+++ b/tests/fbo/fbo-clear-formats.c
@@ -0,0 +1,517 @@
+/*
+ * Copyright © 2009-2011 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-clear-formats.c
+ *
+ * Tests that glClear works correctly on all levels of 2D
+ * texture-based FBOs of various internalformats.
+ */
+
+#include <stdbool.h>
+#include "piglit-util.h"
+#include "fbo-formats.h"
+
+#define TEX_WIDTH 256
+#define TEX_HEIGHT 256
+int piglit_width = 700;
+int piglit_height = 300;
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA;
+
+static const struct test_desc *test_set;
+static int test_index;
+static int format_index;
+
+static GLboolean
+supported(const struct test_desc *test)
+{
+	unsigned i;
+
+	for (i = 0; i < 3; i++) {
+		if (test->ext[i]) {
+			if (!glutExtensionSupported(test->ext[i])) {
+				return GL_FALSE;
+			}
+		}
+	}
+
+	return GL_TRUE;
+}
+
+static void
+key_func(unsigned char key, int x, int y)
+{
+	switch (key) {
+	case 'n': /* next test set */
+		do {
+			test_index++;
+			if (test_index >= ARRAY_SIZE(test_sets)) {
+				test_index = 0;
+			}
+		} while (!supported(&test_sets[test_index]));
+		format_index = 0;
+		printf("Using test set: %s\n", test_sets[test_index].param);
+		break;
+
+	case 'N': /* previous test set */
+		do {
+			test_index--;
+			if (test_index < 0) {
+				test_index = ARRAY_SIZE(test_sets) - 1;
+			}
+		} while (!supported(&test_sets[test_index]));
+		format_index = 0;
+		printf("Using test set: %s\n", test_sets[test_index].param);
+		break;
+
+	case 'm': /* next format */
+		format_index++;
+		if (format_index >= test_sets[test_index].num_formats) {
+			format_index = 0;
+		}
+		break;
+
+	case 'M': /* previous format */
+		format_index--;
+		if (format_index < 0) {
+			format_index = test_sets[test_index].num_formats - 1;
+		}
+		break;
+	}
+
+	piglit_escape_exit_key(key, x, y);
+}
+
+/* Do piglit_rgbw_texture() image but using glClear */
+static bool
+do_rgba_clear(GLenum format, GLuint tex, int level, int size)
+{
+	float red[4]   = {1.0, 0.0, 0.0, 0.0};
+	float green[4] = {0.0, 1.0, 0.0, 0.25};
+	float blue[4]  = {0.0, 0.0, 1.0, 0.5};
+	float white[4] = {1.0, 1.0, 1.0, 1.0};
+	float *color;
+	GLuint fb;
+	GLenum status;
+
+	glGenFramebuffersEXT(1, &fb);
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
+
+	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+				  GL_COLOR_ATTACHMENT0_EXT,
+				  GL_TEXTURE_2D,
+				  tex,
+				  level);
+
+	status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+	if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+		printf("FBO incomplete\n");
+		return false;
+	}
+
+	/* Handle the small sizes of compressed mipmap blocks */
+	switch (format) {
+	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+	case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+	case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+	case GL_COMPRESSED_RGB_FXT1_3DFX:
+	case GL_COMPRESSED_RGBA_FXT1_3DFX:
+		if (size == 4)
+			color = red;
+		else if (size == 2)
+			color = green;
+		else if (size == 1)
+			color = blue;
+		glClearColor(color[0], color[1], color[2], color[3]);
+		glClear(GL_COLOR_BUFFER_BIT);
+		return true;
+	}
+
+	glEnable(GL_SCISSOR_TEST);
+
+	glScissor(0, 0, size / 2, size / 2);
+	glClearColor(red[0], red[1], red[2], red[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glScissor(size / 2, 0, size / 2, size / 2);
+	glClearColor(green[0], green[1], green[2], green[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glScissor(0, size / 2, size / 2, size / 2);
+	glClearColor(blue[0], blue[1], blue[2], blue[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glScissor(size / 2, size / 2, size / 2, size / 2);
+	glClearColor(white[0], white[1], white[2], white[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glDisable(GL_SCISSOR_TEST);
+
+	glDeleteFramebuffersEXT(1, &fb);
+
+	return true;
+}
+
+static bool
+do_depth_clear(GLenum format, GLuint tex, int level, int size)
+{
+	/* XXX: FINISHME */
+	return false;
+}
+
+static bool
+create_tex(GLenum internalformat, GLenum baseformat)
+{
+	GLuint tex;
+	int level, dim;
+	GLenum type, format;
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+
+	if (baseformat == GL_DEPTH_COMPONENT) {
+		format = GL_DEPTH_COMPONENT;
+		type = GL_FLOAT;
+	} else if (baseformat == GL_DEPTH_STENCIL) {
+		format = GL_DEPTH_STENCIL_EXT;
+		type = GL_UNSIGNED_INT_24_8_EXT;
+	} else {
+		format = GL_RGBA;
+		type = GL_FLOAT;
+	}
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+			GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+			GL_LINEAR_MIPMAP_NEAREST);
+
+	for (level = 0, dim = TEX_WIDTH; dim > 0; level++, dim /= 2) {
+		glTexImage2D(GL_TEXTURE_2D, level, internalformat,
+			     dim, dim,
+			     0,
+			     format, type, NULL);
+	}
+
+	for (level = 0, dim = TEX_WIDTH; dim > 0; level++, dim /= 2) {
+		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, level);
+		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, level);
+
+		if (baseformat == GL_DEPTH_COMPONENT ||
+		    baseformat == GL_DEPTH_STENCIL) {
+			if (!do_depth_clear(format, tex, level, dim)) {
+				glDeleteTextures(1, &tex);
+				return 0;
+			}
+		} else {
+			if (!do_rgba_clear(format, tex, level, dim)) {
+				glDeleteTextures(1, &tex);
+				return 0;
+			}
+		}
+	}
+
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, level - 1);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+
+	assert(glGetError() == 0);
+	return tex;
+}
+
+static void
+draw_mipmap(int x, int y, int dim)
+{
+	glViewport(0, 0, piglit_width, piglit_height);
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	glEnable(GL_TEXTURE_2D);
+	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	piglit_draw_rect_tex(x, y, dim, dim,
+			     0, 0, 1, 1);
+
+	glDisable(GL_TEXTURE_2D);
+}
+
+static GLboolean
+test_mipmap_drawing(int x, int y, int dim, int level, GLuint internalformat)
+{
+	GLboolean pass = GL_TRUE;
+	int half = dim / 2;
+	int x1 = x, y1 = y, x2 = x + half, y2 = y + half;
+	float r[] = {1, 0, 0, 0};
+	float g[] = {0, 1, 0, 0.25};
+	float b[] = {0, 0, 1, 0.5};
+	float w[] = {1, 1, 1, 1};
+	GLint r_size, g_size, b_size, l_size, a_size, d_size, i_size;
+	GLint compressed;
+
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_COMPRESSED, &compressed);
+	if (compressed && dim < 8)
+		return GL_TRUE;
+
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_DEPTH_SIZE, &d_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_LUMINANCE_SIZE, &l_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_ALPHA_SIZE, &a_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_INTENSITY_SIZE, &i_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_RED_SIZE, &r_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_GREEN_SIZE, &g_size);
+	glGetTexLevelParameteriv(GL_TEXTURE_2D, level,
+				 GL_TEXTURE_BLUE_SIZE, &b_size);
+
+	if (d_size) {
+		for (x1 = x; x1 < x + dim; x1++) {
+			float val = (x1 - x + 0.5) / (dim);
+			float color[3] = {val, val, val};
+			pass = pass && piglit_probe_rect_rgb(x1, y, 1, dim,
+							     color);
+		}
+		return pass;
+	}
+
+	if (i_size || l_size) {
+		r[0] = 1.0;
+		r[1] = 1.0;
+		r[2] = 1.0;
+
+		g[0] = 0.0;
+		g[1] = 0.0;
+		g[2] = 0.0;
+
+		b[0] = 0.0;
+		b[1] = 0.0;
+		b[2] = 0.0;
+
+		if (i_size) {
+			r[3] = 1.0;
+			g[3] = 0.0;
+			b[3] = 0.0;
+		} else if (l_size && !a_size) {
+			r[3] = 1.0;
+			g[3] = 1.0;
+			b[3] = 1.0;
+			w[3] = 1.0;
+		}
+	} else if (a_size && !r_size && !l_size) {
+		r[0] = 1.0;
+		r[1] = 1.0;
+		r[2] = 1.0;
+		g[0] = 1.0;
+		g[1] = 1.0;
+		g[2] = 1.0;
+		b[0] = 1.0;
+		b[1] = 1.0;
+		b[2] = 1.0;
+	} else {
+		if (!r_size) {
+			r[0] = 0.0;
+			w[0] = 0.0;
+		}
+
+		if (!g_size) {
+			g[1] = 0.0;
+			w[1] = 0.0;
+		}
+
+		if (!b_size) {
+			b[2] = 0.0;
+			w[2] = 0.0;
+		}
+		if (!a_size) {
+			r[3] = 1.0;
+			g[3] = 1.0;
+			b[3] = 1.0;
+			w[3] = 1.0;
+		}
+	}
+
+	/* Clamp the bits for the framebuffer, except we aren't checking
+	 * the actual framebuffer bits.
+	 */
+	if (l_size > 8)
+		l_size = 8;
+	if (i_size > 8)
+		i_size = 8;
+	if (r_size > 8)
+		r_size = 8;
+	if (g_size > 8)
+		g_size = 8;
+	if (b_size > 8)
+		b_size = 8;
+	if (a_size > 8)
+		a_size = 8;
+
+	if (d_size) {
+		piglit_set_tolerance_for_bits(8, 8, 8, 8);
+	} else if (i_size) {
+		piglit_set_tolerance_for_bits(i_size, i_size, i_size, i_size);
+	} else if (l_size) {
+		piglit_set_tolerance_for_bits(l_size, l_size, l_size, a_size);
+	} else {
+		piglit_set_tolerance_for_bits(r_size, g_size, b_size, a_size);
+	}
+
+	if (internalformat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
+	    internalformat == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT) {
+		/* If alpha in DXT1 is < 0.5, the whole pixel should be black. */
+		r[0] = r[1] = r[2] = r[3] = 0;
+		g[0] = g[1] = g[2] = g[3] = 0;
+		/* If alpha in DXT1 is >= 0.5, it should be white. */
+		b[3] = 1;
+	}
+
+	pass = pass && piglit_probe_rect_rgba(x1, y1, half, half, r);
+	pass = pass && piglit_probe_rect_rgba(x2, y1, half, half, g);
+	pass = pass && piglit_probe_rect_rgba(x1, y2, half, half, b);
+	pass = pass && piglit_probe_rect_rgba(x2, y2, half, half, w);
+
+	return pass;
+}
+
+static GLboolean
+test_format(const struct format_desc *format, GLenum baseformat)
+{
+	int dim;
+	GLuint tex;
+	int x;
+	int level;
+	GLboolean pass = GL_TRUE;
+
+	printf("Testing %s\n", format->name);
+	tex = create_tex(format->internalformat, baseformat);
+
+	if (tex == 0)
+		return PIGLIT_SKIP;
+
+	x = 1;
+	for (dim = TEX_WIDTH; dim > 1; dim /= 2) {
+		draw_mipmap(x, 1, dim);
+		x += dim + 1;
+	}
+
+	x = 1;
+	level = 0;
+	for (dim = TEX_WIDTH; dim > 1; dim /= 2) {
+		pass = pass && test_mipmap_drawing(x, 1, dim, level,
+						   format->internalformat);
+		x += dim + 1;
+		level++;
+	}
+
+	glDeleteTextures(1, &tex);
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+static void
+add_result(bool *all_skip, enum piglit_result *end_result,
+	   enum piglit_result new)
+{
+	if (new != PIGLIT_SKIP)
+		*all_skip = false;
+
+	if (new == PIGLIT_FAILURE)
+		*end_result = new;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	enum piglit_result result, end_result = PIGLIT_SUCCESS;
+	bool all_skip = true;
+	int i;
+
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+	glClearColor(0.5, 0.5, 0.5, 0.5);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	if (piglit_automatic) {
+		for (i = 0; i < test_set->num_formats; i++) {
+			result = test_format(&test_set->format[i],
+					     test_set->base);
+			add_result(&all_skip, &end_result, result);
+		}
+	} else {
+		result = test_format(&test_sets[test_index].format[format_index],
+				     test_sets[test_index].base);
+		add_result(&all_skip, &end_result, result);
+	}
+
+	glutSwapBuffers();
+
+	if (all_skip)
+		return PIGLIT_SKIP;
+	return end_result;
+}
+
+
+void piglit_init(int argc, char **argv)
+{
+	int i, j, k;
+
+	glutKeyboardFunc(key_func);
+
+	piglit_require_extension("GL_EXT_framebuffer_object");
+
+	test_set = &test_sets[0];
+
+	for (i = 1; i < argc; i++) {
+		for (j = 1; j < ARRAY_SIZE(test_sets); j++) {
+			if (!strcmp(argv[i], test_sets[j].param)) {
+				for (k = 0; k < 3; k++) {
+					if (test_sets[j].ext[k]) {
+						piglit_require_extension(test_sets[j].ext[k]);
+					}
+				}
+
+				test_set = &test_sets[j];
+				break;
+			}
+		}
+		if (j == ARRAY_SIZE(test_sets)) {
+			fprintf(stderr, "Unknown argument: %s\n", argv[i]);
+			exit(1);
+		}
+	}
+
+	if (!piglit_automatic) {
+		printf("    -n   Next test set.\n"
+		       "    -N   Previous test set.\n"
+		       "    -m   Next format in the set.\n"
+		       "    -M   Previous format in the set.\n");
+	}
+
+	printf("Using test set: %s\n", test_set->param);
+}