blending-in-shader: new test for NV_texture_barrier

4 files changed, 135 insertions, 0 deletions

diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index b32debff9..0762af720 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -4,3 +4,4 @@ add_subdirectory (arb_instanced_arrays)
 add_subdirectory (arb_shader_texture_lod)
 add_subdirectory (ati_envmap_bumpmap)
 add_subdirectory (ext_fog_coord)
+add_subdirectory (nv_texture_barrier)
diff --git a/tests/spec/nv_texture_barrier/CMakeLists.gl.txt b/tests/spec/nv_texture_barrier/CMakeLists.gl.txt
new file mode 100644
index 000000000..95ab0f2c6
--- /dev/null
+++ b/tests/spec/nv_texture_barrier/CMakeLists.gl.txt
@@ -0,0 +1,17 @@
+include_directories(
+	${OPENGL_INCLUDE_PATH}
+	${GLUT_INCLUDE_DIR}
+	${piglit_SOURCE_DIR}/tests/util
+)
+
+link_libraries (
+	piglitutil
+	${OPENGL_gl_LIBRARY}
+	${OPENGL_glu_LIBRARY}
+	${GLUT_glut_LIBRARY}
+	${TIFF_LIBRARY}
+)
+
+add_executable (blending-in-shader blending-in-shader.c)
+
+# vim: ft=cmake:
diff --git a/tests/spec/nv_texture_barrier/CMakeLists.txt b/tests/spec/nv_texture_barrier/CMakeLists.txt
new file mode 100644
index 000000000..144a306f4
--- /dev/null
+++ b/tests/spec/nv_texture_barrier/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/nv_texture_barrier/blending-in-shader.c b/tests/spec/nv_texture_barrier/blending-in-shader.c
new file mode 100644
index 000000000..f2527685a
--- /dev/null
+++ b/tests/spec/nv_texture_barrier/blending-in-shader.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright © 2011 Marek Olšák
+ *
+ * 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.
+ *
+ */
+
+/** @file blending-in-shader.c
+ *
+ * Test programmable blending with GL_NV_texture_barrier.
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 128;
+int piglit_height = 128;
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA;
+
+static GLuint tex, fbo, prog, texloc;
+static float tex_data[16*16*4], res_data[16*16*4];
+
+static const char *fstext = {
+	"uniform sampler2D fb;"
+	"void main() {"
+	"  gl_FragColor = sqrt(texture2D(fb, gl_FragCoord.xy / 16.0));"
+	"}"
+};
+
+#define PASSES 3
+
+enum piglit_result piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+	int i;
+
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 16, 16, 0, GL_RGBA, GL_FLOAT, tex_data);
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
+	glViewport(0, 0, 16, 16);
+
+	piglit_UseProgram(prog);
+	glUniform1i(texloc, 0);
+
+	for (i = 0; i < PASSES; i++) {
+		if (i != 0)
+			glTextureBarrierNV();
+		piglit_draw_rect_tex(-1, -1, 2, 2, 0, 0, 1, 1);
+	}
+
+	pass = piglit_probe_image_rgba(0, 0, 16, 16, res_data);
+
+	piglit_UseProgram(0);
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+	glViewport(0, 0, piglit_width, piglit_height);
+
+	piglit_draw_rect_tex(-1, -1, 2, 2, 0, 0, 1, 1);
+
+	glutSwapBuffers();
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+void piglit_init(int argc, char **argv)
+{
+	unsigned int i, j, fs;
+
+	piglit_require_extension("GL_EXT_framebuffer_object");
+	piglit_require_extension("GL_NV_texture_barrier");
+        piglit_require_GLSL();
+
+	srand(0);
+	for (i = 0; i < 16 * 16 * 4; ++i) {
+		tex_data[i] = (rand() % 256) / 255.f;
+		res_data[i] = tex_data[i];
+		for (j = 0; j < PASSES; j++)
+			res_data[i] = sqrt(res_data[i]);
+	}
+
+	glEnable(GL_TEXTURE_2D);
+	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 16, 16, 0, GL_RGBA, GL_FLOAT, NULL);
+
+	glGenFramebuffersEXT(1, &fbo);
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
+	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
+	assert(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) == GL_FRAMEBUFFER_COMPLETE_EXT);
+
+	fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fstext);
+	prog = piglit_link_simple_program(0, fs);
+
+	texloc = piglit_GetUniformLocation(prog, "fb");
+}