glsl-reload-source: New test for reloading shader source after programs were linked

Signed-off-by: Nicolai Hähnle <nhaehnle@gmail.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/tests/shaders/glsl-reload-source.c b/tests/shaders/glsl-reload-source.c
new file mode 100644
index 000000000..57ad16ab9
--- /dev/null
+++ b/tests/shaders/glsl-reload-source.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2009 Nicolai Hähnle
+ *
+ * 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:
+ *    Nicolai Hähnle <nhaehnle@gmail.com>
+ *
+ */
+
+/**
+ * \file
+ * Test that reloading shader source and relinking programs works correctly.
+ */
+
+#if defined(_MSC_VER)
+#include <windows.h>
+#endif
+
+#include <stdio.h>
+
+#include "piglit-util.h"
+#include "piglit-framework.h"
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+
+#if defined(_MSC_VER)
+#define snprintf sprintf_s
+#endif
+
+int piglit_width = 100, piglit_height = 100;
+int piglit_window_mode = GLUT_RGB;
+
+static const char vs_one[] =
+"attribute vec4 position;\n"
+"varying vec4 color;\n"
+"void main() {\n"
+"   gl_Position = gl_ModelViewProjectionMatrix * position;\n"
+"   color = vec4(0.0, 0.4, 0.0, 1.0);\n"
+"}\n";
+
+static const char vs_two[] =
+"attribute vec4 position;\n"
+"varying vec4 color;\n"
+"void main() {\n"
+"   gl_Position = gl_ModelViewProjectionMatrix * position;\n"
+"   color = vec4(0.4, 0.4, 0.0, 1.0);\n"
+"}\n";
+
+static const char fs_one[] =
+"varying vec4 color;\n"
+"void main() {\n"
+"   gl_FragColor = color;\n"
+"}\n";
+
+static const char fs_two[] =
+"varying vec4 color;\n"
+"void main() {\n"
+"   gl_FragColor = color + vec4(0.4, 0.0, 0.4, 0.0);\n"
+"}\n";
+
+static const GLfloat expect_one_one[3] = { 0.0, 0.4, 0.0 };
+static const GLfloat expect_one_two[3] = { 0.4, 0.4, 0.4 };
+static const GLfloat expect_two_one[3] = { 0.4, 0.4, 0.0 };
+static const GLfloat expect_two_two[3] = { 0.8, 0.4, 0.4 };
+
+static GLuint vs;
+static GLuint fs;
+static GLuint program;
+
+
+static void compile_shader(GLuint shader, const char * text)
+{
+	GLint status;
+
+	glShaderSourceARB(shader, 1, (const GLchar **)&text, NULL);
+	glCompileShaderARB(shader);
+
+	glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
+	if (!status) {
+		GLchar log[1000];
+		GLsizei len;
+		glGetInfoLogARB(shader, 1000, &len, log);
+		fprintf(stderr, "Error: problem compiling shader: %s\n", log);
+		piglit_report_result(PIGLIT_FAILURE);
+	}
+}
+
+static void link_program(GLuint program)
+{
+	GLint status;
+
+	glLinkProgramARB(program);
+	glGetObjectParameterivARB(program, GL_OBJECT_LINK_STATUS_ARB, &status);
+	if (!status) {
+		GLchar log[1000];
+		GLsizei len;
+		glGetInfoLogARB(program, 1000, &len, log);
+		fprintf(stderr, "Error: problem linking program: %s\n", log);
+		piglit_report_result(PIGLIT_FAILURE);
+	}
+}
+
+static void setup_shaders(const char * vstext, const char * fstext)
+{
+	compile_shader(vs, vstext);
+	compile_shader(fs, fstext);
+	link_program(program);
+
+	glUseProgramObjectARB(program);
+	glBindAttribLocationARB(program, 0, "position");
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	enum piglit_result result = PIGLIT_SUCCESS;
+
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	setup_shaders(vs_one, fs_one);
+	piglit_draw_rect(0, 0, piglit_width/2, piglit_height/2);
+	if (!piglit_probe_pixel_rgb(piglit_width/4, piglit_height/4, expect_one_one))
+		result = PIGLIT_FAILURE;
+
+	setup_shaders(vs_one, fs_two);
+	piglit_draw_rect(piglit_width/2, 0, piglit_width/2, piglit_height/2);
+	if (!piglit_probe_pixel_rgb(3*piglit_width/4, piglit_height/4, expect_one_two))
+		result = PIGLIT_FAILURE;
+
+	setup_shaders(vs_two, fs_one);
+	piglit_draw_rect(0, piglit_height/2, piglit_width/2, piglit_height/2);
+	if (!piglit_probe_pixel_rgb(piglit_width/4, 3*piglit_height/4, expect_two_one))
+		result = PIGLIT_FAILURE;
+
+	setup_shaders(vs_two, fs_two);
+	piglit_draw_rect(piglit_width/2, piglit_height/2, piglit_width/2, piglit_height/2);
+	if (!piglit_probe_pixel_rgb(3*piglit_width/4, 3*piglit_height/4, expect_two_two))
+		result = PIGLIT_FAILURE;
+
+	return result;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	if (!GLEW_ARB_shader_objects || !GLEW_ARB_vertex_shader || !GLEW_ARB_fragment_shader) {
+		printf("Requires ARB_shader_objects and ARB_{vertex,fragment}_shader\n");
+		piglit_report_result(PIGLIT_SKIP);
+	}
+
+	vs = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
+	fs = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
+	program = glCreateProgramObjectARB();
+	glAttachObjectARB(program, vs);
+	glAttachObjectARB(program, fs);
+}