Attachment 45105 Details for Bug 35849 – Adds a test demonstrating the bug to piglit

[patch] Adds a test demonstrating the bug to piglit

0001-add-test-to-test-vertex-and-fragment-shaders-can-bot.patch (text/plain), 7.26 KB, created by Julian Adams on 2011-03-31 13:34:23 UTC

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Creator: Julian Adams

Created: 2011-03-31 13:34:23 UTC

Size: 7.26 KB

patch

obsolete

>From b054007ec5e093e3b93cd711d6f5baac65903e11 Mon Sep 17 00:00:00 2001
>From: Julian Adams <joolsa@gmail.com>
>Date: Thu, 31 Mar 2011 21:00:06 +0100
>Subject: [PATCH] add test to test vertex and fragment shaders can both sample from textures
> in the same program
>
>---
> tests/all.tests                                 |    1 +
> tests/texturing/CMakeLists.gl.txt               |    1 +
> tests/texturing/fragment-and-vertex-texturing.c |  194 +++++++++++++++++++++++
> 3 files changed, 196 insertions(+), 0 deletions(-)
> create mode 100644 tests/texturing/fragment-and-vertex-texturing.c
>
>diff --git a/tests/all.tests b/tests/all.tests
>index eb86ae7..7e1dac1 100644
>--- a/tests/all.tests
>+++ b/tests/all.tests
>@@ -531,6 +531,7 @@ add_plain_test(texturing, 'depth-tex-modes')
> add_plain_test(texturing, 'depth-tex-modes-glsl')
> add_plain_test(texturing, 'depth-tex-modes-rg')
> add_plain_test(texturing, 'depth-tex-compare')
>+add_plain_test(texturing, 'fragment-and-vertex-texturing')
> add_plain_test(texturing, 'fxt1-teximage')
> add_plain_test(texturing, 'gen-teximage')
> add_plain_test(texturing, 'gen-compressed-teximage')
>diff --git a/tests/texturing/CMakeLists.gl.txt b/tests/texturing/CMakeLists.gl.txt
>index fd738a8..4583e57 100644
>--- a/tests/texturing/CMakeLists.gl.txt
>+++ b/tests/texturing/CMakeLists.gl.txt
>@@ -26,6 +26,7 @@ add_executable (gen-nonzero-unit gen-nonzero-unit.c)
> add_executable (gen-teximage gen-teximage.c)
> add_executable (gen-texsubimage gen-texsubimage.c)
> add_executable (getteximage-simple getteximage-simple.c)
>+add_executable (fragment-and-vertex-texturing fragment-and-vertex-texturing.c)
> add_executable (levelclamp levelclamp.c)
> add_executable (lodbias lodbias.c)
> add_executable (lodclamp lodclamp.c)
>diff --git a/tests/texturing/fragment-and-vertex-texturing.c b/tests/texturing/fragment-and-vertex-texturing.c
>new file mode 100644
>index 0000000..ea3dd27
>--- /dev/null
>+++ b/tests/texturing/fragment-and-vertex-texturing.c
>@@ -0,0 +1,194 @@
>+/*
>+ * Copyright Â© 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>
>+ *	  Marek OlÅ¡Ã¡k <maraeo@gmail.com>
>+ *
>+ */
>+
>+/** @file fbo-drawbuffers-blend-add.c
>+ *
>+ * Tests that sampling from both vertex and fragment textures each read
>+ * from the correct texture.
>+ */
>+
>+#include <string.h>
>+#include "piglit-util.h"
>+
>+int piglit_width = 128;
>+int piglit_height = 128;
>+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
>+
>+static const char *vs_source =
>+	"uniform sampler2D vertex_tex; \n"
>+	"varying vec3 vertex_tex_color; \n"
>+/*	"uniform sampler2D fragment_tex; \n"
>+	"varying vec3 fragment_tex_color; \n" */
>+	"void main() \n"
>+	"{ \n"
>+	"	gl_Position = gl_Vertex;\n"
>+	"	vertex_tex_color = texture2DLod(vertex_tex, vec2(0.5), 0.0).xyz; \n"
>+/*	"	fragment_tex_color = texture2DLod(fragment_tex, vec2(0.5), 0.0).xyz; \n" */
>+	"} \n";
>+
>+static const char *fs_source =
>+	"uniform sampler2D fragment_tex; \n"
>+	"varying vec3 vertex_tex_color; \n"
>+	"void main() \n"
>+	"{ \n"
>+	"	vec3 fragment_tex_color = texture2D(fragment_tex, vec2(0.5), 0.0).xyz; \n"
>+	"	gl_FragColor = vec4(fragment_tex_color + vertex_tex_color, 1.0); \n"
>+	"} \n";
>+
>+static const char *prog = "fragment-and-vertex-texturing";
>+
>+/* debug aid */
>+static void
>+check_error(int line)
>+{
>+   GLenum err = glGetError();
>+   if (err) {
>+      printf("%s: GL error 0x%x at line %d\n", prog, err, line);
>+   }
>+}
>+
>+/* debug aid */
>+static void
>+check_bad_location(GLint location, int line)
>+{
>+   if (location == -1) {
>+      printf("%s: bad GL location at line %d\n", prog, line);
>+   }
>+}
>+
>+static GLuint
>+make_texture(int texture_unit, unsigned char r, unsigned char g, unsigned char b)
>+{
>+	#define texSide  8
>+	GLuint tex;
>+	unsigned char texImage[texSide * texSide * 4];
>+	GLuint i, j;
>+
>+	for (i = 0; i < texSide; i++) {
>+		for (j = 0; j < texSide; j++) {
>+			int k = (i * texSide + j) * 3;
>+			texImage[k] = r;
>+			texImage[k + 1] = g;
>+			texImage[k + 2] = b;
>+		}
>+	}
>+
>+	glGenTextures(1, &tex);
>+	glActiveTexture(GL_TEXTURE0 + texture_unit);
>+	glBindTexture(GL_TEXTURE_2D, tex);
>+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, texSide, texSide, 0,
>+					 GL_RGB, GL_UNSIGNED_BYTE, texImage);
>+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
>+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
>+	
>+   check_error(__LINE__);
>+	
>+	return tex;
>+}
>+
>+static void
>+display()
>+{
>+	GLuint fs, vs, prog;
>+
>+	/* Clear all to blue so we see if the shader rendering happens. */
>+	glClearColor(0.0, 0.0, 1.0, 1.0);
>+	glClear(GL_COLOR_BUFFER_BIT);
>+
>+	/* Build the shader that spams green to all outputs. */
>+	vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
>+
>+	fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_source);
>+
>+	prog = piglit_link_simple_program(vs, fs);
>+	glUseProgram(prog);
>+
>+   check_error(__LINE__);
>+	
>+	const int vertex_tex_slot = 0;
>+	const int fragment_tex_slot = 1;
>+	GLuint red = make_texture(vertex_tex_slot, 127, 0, 0);
>+	GLuint green = make_texture(fragment_tex_slot, 0, 127, 0);
>+
>+	// -1 is bad
>+	GLint vertex_tex_loc = glGetUniformLocation(prog, "vertex_tex");
>+	check_bad_location(vertex_tex_loc, __LINE__);
>+	
>+	GLint fragment_tex_loc = glGetUniformLocation(prog, "fragment_tex");
>+	check_bad_location(fragment_tex_loc, __LINE__);
>+	
>+	glUniform1i(vertex_tex_loc, vertex_tex_slot);
>+	glUniform1i(fragment_tex_loc, fragment_tex_slot);
>+		
>+	piglit_draw_rect(-1, -1, 2, 2);
>+	
>+   check_error(__LINE__);
>+	
>+	glDeleteTextures(1, &red);
>+	glDeleteTextures(1, &green);
>+
>+   check_error(__LINE__);
>+}
>+
>+enum piglit_result
>+piglit_display(void)
>+{
>+	int pass;
>+	
>+	display();
>+
>+	float expected[] = {0.5, 0.5, 0.0};
>+	
>+	pass = piglit_probe_pixel_rgb(1, 1, expected);
>+	
>+	glutSwapBuffers();
>+
>+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
>+}
>+
>+void
>+piglit_init(int argc, char **argv)
>+{
>+	int m;
>+
>+	printf("The result should be a solid block of half-bright yellow color\n");
>+
>+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
>+
>+	if (!GLEW_VERSION_2_0) {
>+		printf("Requires OpenGL 2.0\n");
>+		piglit_report_result(PIGLIT_SKIP);
>+	}
>+
>+	glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB, &m);
>+   if (m < 1) {
>+      printf("No vertex shader texture units supported.\n");
>+		piglit_report_result(PIGLIT_SKIP);
>+   }
>+}
>+
>-- 
>1.7.1
>

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