Tests various texture sampling functions using constant 0 values for
the arguments. The i965 driver has optimisations for trailing 0
arguments to sampler messages so the intention is to test these code
paths.
---
I haven't actually pushed the patches for the i965 driver yet so the
commit message is a bit of a lie.
tests/all.py | 10 ++
tests/texturing/CMakeLists.gl.txt | 1 +
tests/texturing/zero-tex-coord.c | 256 ++++++++++++++++++++++++++++++++++++++
3 files changed, 267 insertions(+)
create mode 100644 tests/texturing/zero-tex-coord.c
diff --git a/tests/all.py b/tests/all.py
index 6197c18..2b275d7 100755
--- a/tests/all.py
+++ b/tests/all.py
@@ -638,6 +638,16 @@ with profile.group_manager(PiglitGLTest, 'shaders') as g:
for subtest in ('interstage', 'intrastage', 'vs-gs'):
g(['version-mixing', subtest])
+ for subtest in ('texture2D',
+ 'bias',
+ 'textureGrad',
+ 'texelFetch',
+ 'textureLod',
+ 'textureSize',
+ 'textureQueryLOD',
+ 'textureGather'):
+ g(['zero-tex-coord', subtest])
+
with profile.group_manager(
PiglitGLTest, 'glx',
require_platforms=['glx', 'mixed_glx_egl']) as g:
diff --git a/tests/texturing/CMakeLists.gl.txt
b/tests/texturing/CMakeLists.gl.txt
index fc5c38f..6981fbc 100644
--- a/tests/texturing/CMakeLists.gl.txt
+++ b/tests/texturing/CMakeLists.gl.txt
@@ -93,5 +93,6 @@ piglit_add_executable (texsubimage texsubimage.c)
piglit_add_executable (texture-al texture-al.c)
piglit_add_executable (texture-rg texture-rg.c)
piglit_add_executable (teximage-colors teximage-colors.c)
+piglit_add_executable (zero-tex-coord zero-tex-coord.c)
# vim: ft=cmake:
diff --git a/tests/texturing/zero-tex-coord.c b/tests/texturing/zero-tex-coord.c
new file mode 100644
index 0000000..aa902e9
--- /dev/null
+++ b/tests/texturing/zero-tex-coord.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright © 2015 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:
+ * Neil Roberts <n...@linux.intel.com>
+ *
+ */
+
+/** @file zero-tex-coord.c
+ *
+ * Tests various texture sampling functions using constant 0 values
+ * for the arguments. The i965 driver has optimisations for trailing 0
+ * arguments to sampler messages so the intention is to test these
+ * code paths.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 10;
+ config.supports_gl_core_version = 31;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+struct sample_function {
+ const char *name;
+ const char *snippet;
+ int glsl_version;
+ const char *extension;
+};
+
+static const struct sample_function
+sample_functions[] = {
+ { "texture2D", "texture2D(tex, vec2(0.0))", 0 },
+ { "bias", "texture2D(tex, vec2(0.0), 0.0)", 0 },
+ { "textureGrad",
+ "textureGrad(tex, vec2(0.0), vec2(0.0), vec2(0.0))",
+ 130 },
+ { "texelFetch", "texelFetch(tex, ivec2(0), 0)", 130 },
+ { "textureLod",
+ "textureLod(tex, vec2(0.0), 0.0)",
+ 130 },
+ { "textureSize",
+ "textureSize(tex, 0) == ivec2(4) ? "
+ "vec4(1.0, 0.0, 0.0, 1.0) : "
+ "vec4(0.0, 1.0, 0.0, 1.0)",
+ 130 },
+ { "textureQueryLOD",
+ "textureQueryLOD(tex, vec2(0.0)).x == 0.0 ? "
+ "vec4(1.0, 0.0, 0.0, 1.0) : "
+ "vec4(0.0, 1.0, 0.0, 1.0)",
+ 0, "GL_ARB_texture_query_lod" },
+ { "textureGather",
+ "textureGather(tex, vec2(0.0), 0) == vec4(1.0) ? "
+ "vec4(1.0, 0.0, 0.0, 1.0) : "
+ "vec4(0.0, 1.0, 0.0, 1.0)",
+ 130, "GL_ARB_gpu_shader5" },
+};
+
+static const char
+vertex_source[] =
+ "attribute vec2 piglit_vertex;\n"
+ "\n"
+ "void\n"
+ "main()\n"
+ "{\n"
+ " gl_Position = vec4(piglit_vertex, 0.0, 1.0);\n"
+ "}\n";
+
+static const char
+fragment_source[] =
+ "uniform sampler2D tex;\n"
+ "\n"
+ "void\n"
+ "main()\n"
+ "{\n"
+ " gl_FragColor = SNIPPET;\n"
+ "}\n";
+
+const struct sample_function *
+sample_function = sample_functions;
+
+static const GLfloat
+red[] = { 1.0f, 0.0f, 0.0f, 1.0f };
+
+static GLuint
+make_tex(void)
+{
+ /* Make a fully mipmapped texture with a red texel on at the
+ * 0,0 position on the largest mip image and a green texel for
+ * all of the other positions */
+
+ GLuint tex;
+ int size = 4;
+ int level = 0;
+ GLubyte *image, *p;
+ int y, x;
+
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glTexParameteri(GL_TEXTURE_2D,
+ GL_TEXTURE_MIN_FILTER,
+ GL_NEAREST_MIPMAP_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D,
+ GL_TEXTURE_MAG_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);
+
+ while (size >= 1) {
+ p = image = malloc(size * size * 4);
+
+ for (y = 0; y < size; y++) {
+ for (x = 0; x < size; x++) {
+ if (level == 0 && y == 0 && x == 0) {
+ *(p++) = 0xff;
+ *(p++) = 0x00;
+ } else {
+ *(p++) = 0x00;
+ *(p++) = 0xff;
+ }
+ *(p++) = 0x00;
+ *(p++) = 0x00;
+ }
+ }
+
+ glTexImage2D(GL_TEXTURE_2D,
+ level,
+ GL_RGBA,
+ size, size,
+ 0, /* border */
+ GL_RGBA, GL_UNSIGNED_BYTE,
+ image);
+
+ free(image);
+
+ size /= 2;
+ level++;
+ }
+
+ return tex;
+}
+
+static GLuint
+make_program(void)
+{
+ const char *snippet = sample_function->snippet;
+ int glsl_version = sample_function->glsl_version;
+ int snippet_length = strlen(snippet);
+ int snippet_pos = strstr(fragment_source, "SNIPPET") - fragment_source;
+ GLuint program;
+ char source[1000], *p = source;
+
+ if (glsl_version > 0) {
+ p += sprintf(p, "#version %i\n", glsl_version);
+ piglit_require_GLSL_version(glsl_version);
+ }
+
+ if (sample_function->extension) {
+ p += sprintf(p,
+ "#extension %s : require\n",
+ sample_function->extension);
+ piglit_require_extension(sample_function->extension);
+ }
+
+ memcpy(p, fragment_source, snippet_pos);
+ p += snippet_pos;
+ memcpy(p, snippet, snippet_length);
+ p += snippet_length;
+ memcpy(p,
+ fragment_source + snippet_pos + 7,
+ sizeof fragment_source - snippet_pos - 7);
+
+ program = piglit_build_simple_program(vertex_source, source);
+
+ return program;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLboolean pass = GL_TRUE;
+ GLuint program, tex;
+ GLint tex_location;
+
+ tex = make_tex();
+ program = make_program();
+
+ glUseProgram(program);
+ tex_location = glGetUniformLocation(program, "tex");
+ glUniform1i(tex_location, 0);
+
+ piglit_draw_rect(-1.0f, -1.0f, 2.0f, 2.0f);
+
+ glUseProgram(0);
+
+ glDeleteTextures(1, &tex);
+ glDeleteProgram(program);
+
+ pass = piglit_probe_rect_rgb(0, 0,
+ piglit_width, piglit_height,
+ red) && pass;
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ int i;
+
+ if (argc > 1) {
+ for (i = 0; i < ARRAY_SIZE(sample_functions); i++) {
+ if (!strcmp(sample_functions[i].name, argv[1])) {
+ sample_function = sample_functions + i;
+ goto found;
+ }
+ }
+
+ fprintf(stderr, "Unknown function: %s\n", argv[1]);
+ piglit_report_result(PIGLIT_FAIL);
+
+ found:
+ (void) 0;
+ }
+
+ piglit_require_GLSL();
+}
--
1.9.3
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