fbo-generatemipmap-1d: new test for mipmap generation of 1D textures

Reviewed-by: Brian Paul <brianp@vmware.com>

2 files changed, 245 insertions, 0 deletions

diff --git a/tests/fbo/CMakeLists.gl.txt b/tests/fbo/CMakeLists.gl.txt
index eab030623..04a19a89f 100644
--- a/tests/fbo/CMakeLists.gl.txt
+++ b/tests/fbo/CMakeLists.gl.txt
@@ -54,6 +54,7 @@ piglit_add_executable (fbo-flushing-2 fbo-flushing-2.c)
 piglit_add_executable (fbo-fragcoord fbo-fragcoord.c)
 piglit_add_executable (fbo-fragcoord2 fbo-fragcoord2.c)
 piglit_add_executable (fbo-generatemipmap fbo-generatemipmap.c)
+piglit_add_executable (fbo-generatemipmap-1d fbo-generatemipmap-1d.c)
 piglit_add_executable (fbo-generatemipmap-array fbo-generatemipmap-array.c)
 piglit_add_executable (fbo-generatemipmap-cubemap fbo-generatemipmap-cubemap.c)
 piglit_add_executable (fbo-generatemipmap-filtering fbo-generatemipmap-filtering.c)
diff --git a/tests/fbo/fbo-generatemipmap-1d.c b/tests/fbo/fbo-generatemipmap-1d.c
new file mode 100644
index 000000000..f996ffd0f
--- /dev/null
+++ b/tests/fbo/fbo-generatemipmap-1d.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ * Copyright © 2011 Red Hat Inc.
+ * Copyright © 2014 Advanced Micro Devices, Inc.
+ *
+ * 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:
+ *     Dave Airlie
+ *     Marek Olšák <maraeo@gmail.com>
+ *
+ */
+
+#include "piglit-util-gl-common.h"
+
+#define TEX_SIZE 128
+#define TEX_LEVELS 8
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 20;
+
+	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const float red[] =   {1, 0, 0, 0};
+static const float green[] = {0, 1, 0, 0};
+static const float blue[] =  {0, 0, 1, 0};
+static const float white[] = {1, 1, 1, 1};
+
+static const char *fs_1d =
+   "uniform sampler1D tex; \n"
+   "void main() \n"
+   "{ \n"
+   "   gl_FragColor = texture1D(tex, gl_TexCoord[0].x); \n"
+   "} \n";
+
+static GLuint prog;
+
+static float colors[4][4] = {
+	{1.0, 0.0, 0.0, 1.0},
+	{0.0, 1.0, 0.0, 1.0},
+	{0.0, 0.0, 1.0, 1.0},
+	{1.0, 0.0, 1.0, 1.0},
+};
+
+static GLenum format;
+
+static void
+load_texture_1d(void)
+{
+	float p[TEX_SIZE * 4];
+	int x;
+
+	for (x = 0; x < TEX_SIZE; x++) {
+		int c = x / (TEX_SIZE/4);
+		memcpy(&p[x*4], colors[c], sizeof(float) * 4);
+	}
+
+	glTexSubImage1D(GL_TEXTURE_1D, 0, 0, TEX_SIZE, GL_RGBA, GL_FLOAT, p);
+}
+
+static GLuint
+create_texture_1d(void)
+{
+	GLuint tex, fb;
+	GLenum status;
+	int i, dim;
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_1D, tex);
+	glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+	glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	for (i = 0, dim = TEX_SIZE; dim >0; i++, dim /= 2) {
+		glTexImage1D(GL_TEXTURE_1D, i, format, dim, 0,
+			     GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+	}
+
+	glGenFramebuffers(1, &fb);
+	glBindFramebuffer(GL_FRAMEBUFFER, fb);
+
+	glFramebufferTexture1D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+			       GL_TEXTURE_1D, tex, 0);
+
+	status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+	if (status != GL_FRAMEBUFFER_COMPLETE) {
+		load_texture_1d();
+		goto done;
+	}
+
+	glViewport(0, 0, TEX_SIZE, 1);
+	piglit_ortho_projection(TEX_SIZE, 1, GL_FALSE);
+
+	glColor4fv(colors[0]);
+	piglit_draw_rect(0, 0, TEX_SIZE / 4, 1);
+	glColor4fv(colors[1]);
+	piglit_draw_rect(TEX_SIZE / 4, 0, TEX_SIZE / 4, 1);
+	glColor4fv(colors[2]);
+	piglit_draw_rect(TEX_SIZE / 2, 0, TEX_SIZE / 4, 1);
+	glColor4fv(colors[3]);
+	piglit_draw_rect(TEX_SIZE/4 * 3, 0, TEX_SIZE / 4, 1);
+
+done:
+	glDeleteFramebuffers(1, &fb);
+	glGenerateMipmap(GL_TEXTURE_1D);
+	return tex;
+}
+
+static void
+draw_level(int x, int y, int level)
+{
+	int loc;
+
+	glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_LOD, level);
+	glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAX_LOD, level);
+
+	glUseProgram(prog);
+	loc = glGetUniformLocation(prog, "tex");
+	glUniform1i(loc, 0); /* texture unit p */
+
+	glViewport(0, 0, piglit_width, piglit_height);
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	glBindFramebuffer(GL_FRAMEBUFFER, piglit_winsys_fbo);
+
+	piglit_draw_rect_tex(x, y, TEX_SIZE, 5, 0, 0, 1, 1);
+	glUseProgram(0);
+}
+
+static bool
+test_level(int level)
+{
+	int size = TEX_SIZE >> level;
+	int x,i,c;
+	float e[TEX_SIZE * 4], observed[TEX_SIZE * 4];
+
+	glGetTexImage(GL_TEXTURE_1D, level, GL_RGBA, GL_FLOAT, observed);
+
+	if (size == 1) {
+		memset(e, 0, 4 * sizeof(float));
+
+		/* Average the colors for the last level. */
+		for (i = 0; i < 4; i++)
+			for (c = 0; c < 4; c++)
+				e[c] += colors[i][c] * 0.25;
+	}
+	else if (size == 2) {
+		memset(e, 0, 8 * sizeof(float));
+
+		for (i = 0; i < 2; i++)
+			for (c = 0; c < 4; c++)
+				e[c] += colors[i][c] * 0.5;
+		for (i = 2; i < 4; i++)
+			for (c = 0; c < 4; c++)
+				e[4+c] += colors[i][c] * 0.5;
+	}
+	else {
+		for (x = 0; x < size; x++) {
+			int col = x / (size/4);
+			memcpy(&e[x*4], colors[col], sizeof(float) * 4);
+		}
+	}
+
+	for (x = 0; x < size; x++) {
+		float *probe = &observed[x*4];
+		float *expected = &e[x*4];
+
+		for (i = 0; i < 4; ++i) {
+			if (fabs(probe[i] - expected[i]) >= piglit_tolerance[i]) {
+				printf("Probe color at (%i)\n", x);
+				printf("  Expected: %f %f %f %f\n",
+				       expected[0], expected[1], expected[2], expected[3]);
+				printf("  Observed: %f %f %f %f\n",
+				       probe[0], probe[1], probe[2], probe[3]);
+				printf("  when testing level %i\n", level);
+				return false;
+			}
+		}
+	}
+	return true;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+	GLuint tex1d;
+	int level;
+
+	glClearColor(0.1, 0.1, 0.1, 0.1);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	tex1d = create_texture_1d();
+
+	for (level = 0; level < TEX_LEVELS; level++) {
+		draw_level(5, 5 + level * 10, level);
+		pass = pass && test_level(level);
+	}
+
+	glDeleteTextures(1, &tex1d);
+	piglit_present_results();
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void piglit_init(int argc, char **argv)
+{
+	int i;
+
+	piglit_require_extension("GL_EXT_framebuffer_object");
+
+	format = GL_RGBA8;
+
+	for (i = 1; i < argc; i++) {
+		if (strcmp(argv[i], "RGB9_E5") == 0) {
+			/* Test a non-renderable format. */
+			piglit_require_extension("GL_EXT_texture_shared_exponent");
+			format = GL_RGB9_E5;
+		}
+		else {
+			assert(0);
+		}
+	}
+
+	prog = piglit_build_simple_program(NULL, fs_1d);
+}