gl-3.2-pointsprite-origin: test a MacOS sprite origin bug

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

3 files changed, 183 insertions, 0 deletions

diff --git a/tests/all.py b/tests/all.py
index 42f4fd51f..dec745ad1 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1004,6 +1004,7 @@ spec['!OpenGL 3.2/layered-rendering/gl-layer-cube-map'] = PiglitGLTest('gl-3.2-l
 spec['!OpenGL 3.2/layered-rendering/gl-layer-not-layered'] = PiglitGLTest('gl-3.2-layered-rendering-gl-layer-not-layered', run_concurrent=True)
 spec['!OpenGL 3.2/layered-rendering/gl-layer-render'] = PiglitGLTest('gl-3.2-layered-rendering-gl-layer-render', run_concurrent=True)
 spec['!OpenGL 3.2/pointsprite-coord'] = PiglitGLTest('gl-3.2-pointsprite-coord', run_concurrent=True)
+spec['!OpenGL 3.2/pointsprite-origin'] = PiglitGLTest('gl-3.2-pointsprite-origin', run_concurrent=True)
 spec['!OpenGL/coord-replace-doesnt-eliminate-frag-tex-coords'] = PiglitGLTest('gl-coord-replace-doesnt-eliminate-frag-tex-coords', run_concurrent=True)
 spec['!OpenGL/get-active-attrib-returns-all-inputs'] = PiglitGLTest('gl-get-active-attrib-returns-all-inputs', run_concurrent=True)
 spec['!OpenGL 3.2/texture-border-deprecated'] = PiglitGLTest('gl-3.2-texture-border-deprecated', run_concurrent=True)
diff --git a/tests/spec/gl-3.2/CMakeLists.gl.txt b/tests/spec/gl-3.2/CMakeLists.gl.txt
index b60323ba8..0ffa7fc3c 100644
--- a/tests/spec/gl-3.2/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.2/CMakeLists.gl.txt
@@ -17,6 +17,7 @@ piglit_add_executable (gl-3.2-get-buffer-parameter-i64v get-buffer-parameter-i64
 piglit_add_executable (gl-3.2-get-integer-64iv get-integer-64iv.c)
 piglit_add_executable (gl-3.2-get-integer-64v get-integer-64v.c)
 piglit_add_executable (gl-3.2-pointsprite-coord pointsprite-coord.c)
+piglit_add_executable (gl-3.2-pointsprite-origin pointsprite-origin.c)
 piglit_add_executable (gl-3.2-texture-border-deprecated texture-border-deprecated.c)
 piglit_add_executable (glsl-resource-not-bound glsl-resource-not-bound.c)
 piglit_add_executable (gl-coord-replace-doesnt-eliminate-frag-tex-coords gl-coord-replace-doesnt-eliminate-frag-tex-coords)
diff --git a/tests/spec/gl-3.2/pointsprite-origin.c b/tests/spec/gl-3.2/pointsprite-origin.c
new file mode 100644
index 000000000..9009d2f34
--- /dev/null
+++ b/tests/spec/gl-3.2/pointsprite-origin.c
@@ -0,0 +1,181 @@
+/*
+ * Copyright © 2014 VMware, 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.
+ */
+
+/**
+ * With Mac AMD GL OpenGL drivers, the texture coordinate v (in Y-direction)
+ * is flipped for point sprites.
+ *
+ * Known to be
+ *      -- Present in : ATI HD 6770M on Mac OS X 10.8.4
+ *      -- Fixed in   : Mac OS 10.9
+ */
+
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 32;
+	config.supports_gl_compat_version = 32;
+
+	config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+#define WIDTH 32
+#define HEIGHT 32
+#define COLOR_GRAY       0x7F7F7FFF
+#define CLEAR_COLOR      0x000033FF
+
+static GLuint prog;
+
+static bool
+test_pointsprite_origin(void)
+{
+	const unsigned int numPixels = WIDTH * HEIGHT;
+	GLuint texData[WIDTH * HEIGHT];
+	GLuint i, texFbo, fbo, vao;
+	const float pointSize = WIDTH;
+	const unsigned char expectedChannelVal = 0.5f / WIDTH * 255.0f + 0.5f;
+	const unsigned int  expectedTexelColor = expectedChannelVal << 24 |
+						 expectedChannelVal << 16 |
+						 0x0000FFFF;
+
+	for (i = 0; i < numPixels; ++i) {
+		texData[i] = COLOR_GRAY;
+	}
+
+	/* Create vertex arrays */
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+
+	/* Create 2D textures */
+	glGenTextures(1, &texFbo);
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(GL_TEXTURE_2D, texFbo);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, WIDTH, HEIGHT, 0,
+		     GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, texData);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		return false;
+
+	/* Setup the FBO */
+	glGenFramebuffers(1, &fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+			       GL_TEXTURE_2D, texFbo, 0);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
+	    GL_FRAMEBUFFER_COMPLETE) {
+		printf("incomplete framebuffer at line %d\n", __LINE__);
+		return false;
+	}
+
+	glDrawBuffer(GL_COLOR_ATTACHMENT0);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
+	    GL_FRAMEBUFFER_COMPLETE) {
+		printf("incomplete framebuffer at line %d\n", __LINE__);
+		return false;
+	}
+
+	/* Clear and draw */
+	glViewport(0, 0, WIDTH, HEIGHT);
+	glClearColor(((CLEAR_COLOR >> 24) & 0xFF) / 255.0f,
+		     ((CLEAR_COLOR >> 16) & 0xFF) / 255.0f,
+		     ((CLEAR_COLOR >> 8)  & 0xFF) / 255.0f,
+		     ((CLEAR_COLOR) & 0xFF) / 255.0f);
+	glClear(GL_COLOR_BUFFER_BIT);
+	glPointSize(pointSize);
+	glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, GL_LOWER_LEFT);
+	glDrawArrays(GL_POINTS, 0, 1);
+
+	/* Read back */
+	glReadBuffer(GL_COLOR_ATTACHMENT0);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
+	    GL_FRAMEBUFFER_COMPLETE) {
+		printf("incomplete framebuffer at line %d\n", __LINE__);
+		return false;
+	}
+
+	/* read color buffer */
+	glPixelStorei(GL_PACK_ROW_LENGTH, WIDTH);
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
+	memset(texData, 0, sizeof(texData));
+	glReadPixels(0, 0, WIDTH, HEIGHT,
+		     GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, texData);
+
+	if (texData[0] != expectedTexelColor) {
+		printf("At pixel (0,0) expected 0x%x but found 0x%x\n",
+			expectedTexelColor, texData[0]);
+		/* clean up */
+		glDeleteTextures(1, &texFbo);
+		glDeleteFramebuffers(1, &fbo);
+		return false;
+	}
+
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		return false;
+
+	glDeleteTextures(1, &texFbo);
+	glDeleteFramebuffers(1, &fbo);
+	return true;
+}
+
+
+static void
+setup_shaders(void)
+{
+	static const char *vsSrc =
+		"#version 150\n"
+		"void main(void) {"
+		"   gl_Position = vec4(0, 0, 0, 1);"
+		"}";
+	static const char *fsSrc =
+		"#version 150\n"
+		"out vec4 fragColor0;"
+		"void main(void) {"
+		"   fragColor0.xy = gl_PointCoord.xy;"
+		"   fragColor0.zw = vec2(1, 1);"
+		"}";
+
+	/* Create shaders and the program */
+	prog = piglit_build_simple_program(vsSrc, fsSrc);
+	glBindFragDataLocation(prog, 0, "fragColor0");
+	glLinkProgram(prog);
+	glUseProgram(prog);
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+	bool pass = test_pointsprite_origin();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	setup_shaders();
+}