fxt1-teximage: New test like s3tc-teximage for 3DFX FXT1.

I recently broke this on the intel drivers.

3 files changed, 184 insertions, 0 deletions

diff --git a/tests/all.tests b/tests/all.tests
index fede37bf4..23b5d4a14 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -336,6 +336,7 @@ add_plain_test(texturing, 'array-texture')
 add_plain_test(texturing, 'copytexsubimage')
 add_plain_test(texturing, 'cubemap')
 add_plain_test(texturing, 'depth-level-clamp')
+add_plain_test(texturing, 'fxt1-teximage')
 add_plain_test(texturing, 'gen-teximage')
 add_plain_test(texturing, 'gen-compressed-teximage')
 add_plain_test(texturing, 'gen-nonzero-unit')
diff --git a/tests/texturing/CMakeLists.txt b/tests/texturing/CMakeLists.txt
index 9c1635e0a..507f63a55 100644
--- a/tests/texturing/CMakeLists.txt
+++ b/tests/texturing/CMakeLists.txt
@@ -36,6 +36,7 @@ add_executable (lodclamp-between-max lodclamp-between-max.c)
 add_executable (mipmap-setup mipmap-setup.c)
 add_executable (rg-draw-pixels rg-draw-pixels.c)
 add_executable (s3tc-teximage s3tc-teximage.c)
+add_executable (fxt1-teximage fxt1-teximage.c)
 add_executable (s3tc-texsubimage s3tc-texsubimage.c)
 add_executable (streaming-texture-leak streaming-texture-leak.c)
 add_executable (tex3d tex3d.c)
diff --git a/tests/texturing/fxt1-teximage.c b/tests/texturing/fxt1-teximage.c
new file mode 100644
index 000000000..5d3a64c0f
--- /dev/null
+++ b/tests/texturing/fxt1-teximage.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright © 2009 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:
+ *    Chris Lord <chris@openedhand.com>
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/** @file fxt1-teximage.c
+ *
+ * Tests that a full 3DFX FXT1-compressed mipmap tree can be created
+ * and used.
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 300, piglit_height = 300;
+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
+
+#define SIZE 128
+
+const float red[4] =   {1.0, 0.0, 0.0, 1.0};
+const float green[4] = {0.0, 1.0, 0.0, 1.0};
+const float blue[4] =  {0.0, 0.0, 1.0, 1.0};
+const float white[4] = {1.0, 1.0, 1.0, 1.0};
+
+static void
+display_mipmaps(int start_x, int start_y)
+{
+	int i;
+
+	glEnable(GL_TEXTURE_2D);
+
+	/* Disply all the mipmap levels */
+	for (i = SIZE; i > 0; i /= 2) {
+		glBegin(GL_QUADS);
+		glTexCoord2f(0.0, 0.0); glVertex2f(start_x + 0, start_y + 0);
+		glTexCoord2f(1.0, 0.0); glVertex2f(start_x + i, start_y + 0);
+		glTexCoord2f(1.0, 1.0); glVertex2f(start_x + i, start_y + i);
+		glTexCoord2f(0.0, 1.0); glVertex2f(start_x + 0, start_y + i);
+		glEnd();
+
+		start_x += i + 5;
+	}
+}
+
+static GLuint
+create_texture(GLenum format)
+{
+	GLfloat *data;
+	int size, x, y, level;
+	GLuint tex;
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+			GL_LINEAR_MIPMAP_NEAREST);
+	data = malloc(SIZE * SIZE * 4 * sizeof(GLfloat));
+
+	for (level = 0, size = SIZE; size > 0; level++, size >>= 1) {
+		for (y = 0; y < size; y++) {
+			for (x = 0; x < size; x++) {
+				const float *color;
+
+				if (size == 4)
+					color = red;
+				else if (size == 2)
+					color = green;
+				else if (size == 1)
+					color = blue;
+				else if (x < size / 2 && y < size / 2)
+					color = red;
+				else if (y < size / 2)
+					color = green;
+				else if (x < size / 2)
+					color = blue;
+				else
+					color = white;
+
+				memcpy(data + (y * size + x) * 4, color,
+				       4 * sizeof(float));
+			}
+		}
+		glTexImage2D(GL_TEXTURE_2D, level,
+			     format,
+			     size, size, 0,
+			     GL_RGBA, GL_FLOAT, data);
+	}
+	free(data);
+	return tex;
+}
+
+static GLboolean
+check_resulting_mipmaps(int x, int y)
+{
+	GLboolean pass = GL_TRUE;
+	int size;
+
+	for (size = SIZE; size > 0; size /= 2) {
+		if (size == 4)
+			pass = pass && piglit_probe_pixel_rgb(x + 2, y + 2,
+							      red);
+		else if (size == 2)
+			pass = pass && piglit_probe_pixel_rgb(x + 1, y + 1,
+							      green);
+		else if (size == 1)
+			pass = pass && piglit_probe_pixel_rgb(x, y,
+							      blue);
+		else {
+			pass = pass && piglit_probe_pixel_rgb(x + size / 4,
+							      y + size / 4,
+							      red);
+			pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
+							      y + size / 4,
+							      green);
+			pass = pass && piglit_probe_pixel_rgb(x + size / 4,
+							      y + size * 3 / 4,
+							      blue);
+			pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
+							      y + size * 3 / 4,
+							      white);
+		}
+		x += size + 5;
+	}
+
+	return pass;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	GLuint tex;
+	GLboolean pass = GL_TRUE;
+
+	glClearColor(0, 0, 0, 0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	tex = create_texture(GL_COMPRESSED_RGB_FXT1_3DFX);
+	display_mipmaps(10, 10 + (10 + SIZE) * 0);
+	glDeleteTextures(1, &tex);
+	tex = create_texture(GL_COMPRESSED_RGBA_FXT1_3DFX);
+	display_mipmaps(10, 10 + (10 + SIZE) * 1);
+	glDeleteTextures(1, &tex);
+
+	pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 0);
+	pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 1);
+
+	glutSwapBuffers();
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_3DFX_texture_compression_FXT1");
+
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+}