[Piglit] [PATCH] max-samplers: use the maximum number of textures in every shader
Marek Olšák
maraeo at gmail.com
Wed May 8 10:49:32 PDT 2013
---
tests/all.tests | 1 +
tests/spec/gl-3.1/CMakeLists.gl.txt | 1 +
tests/spec/gl-3.1/max-samplers.c | 274 +++++++++++++++++++++++++++++++++++
3 files changed, 276 insertions(+)
create mode 100644 tests/spec/gl-3.1/max-samplers.c
diff --git a/tests/all.tests b/tests/all.tests
index 262b44c..b5f64f5 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -704,6 +704,7 @@ gl31 = Group()
spec['!OpenGL 3.1'] = gl31
gl31['genned-names'] = concurrent_test('gl-3.1-genned-names')
gl31['minmax'] = concurrent_test('gl-3.1-minmax')
+gl31['max-samplers'] = concurrent_test('gl-3.1-max-samplers')
for subtest in ['generated', 'written', 'flush']:
cmdline = 'primitive-restart-xfb {0}'.format(subtest)
gl31[cmdline] = concurrent_test('gl-3.1-' + cmdline)
diff --git a/tests/spec/gl-3.1/CMakeLists.gl.txt b/tests/spec/gl-3.1/CMakeLists.gl.txt
index 70eb135..0aaa1f0 100644
--- a/tests/spec/gl-3.1/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.1/CMakeLists.gl.txt
@@ -12,5 +12,6 @@ link_libraries (
piglit_add_executable (gl-3.1-genned-names genned-names.c)
piglit_add_executable (gl-3.1-minmax minmax.c)
piglit_add_executable (gl-3.1-primitive-restart-xfb primitive-restart-xfb.c)
+piglit_add_executable (gl-3.1-max-samplers max-samplers.c)
# vim: ft=cmake:
diff --git a/tests/spec/gl-3.1/max-samplers.c b/tests/spec/gl-3.1/max-samplers.c
new file mode 100644
index 0000000..9a9c7e3
--- /dev/null
+++ b/tests/spec/gl-3.1/max-samplers.c
@@ -0,0 +1,274 @@
+/*
+ * 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:
+ * Marek Olšák <maraeo at gmail.com>
+ */
+
+/**
+ * Tests that binding the maximum number of textures in both the vertex and
+ * fragment shader works.
+ */
+
+#include <string.h>
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_core_version = 31;
+
+ config.window_width = 128;
+ config.window_height = 128;
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const char *vs_source =
+ "#define NUM %i \n"
+ "uniform sampler2D vertex_tex[NUM]; \n"
+ "uniform int vertex_index;"
+ "varying vec3 vertex_tex_color; \n"
+ "void main() \n"
+ "{ \n"
+ " int i; \n"
+ " gl_Position = gl_Vertex; \n"
+ " vertex_tex_color = vec3(0.0); \n"
+ " for (i = 0; i < NUM; i++) \n"
+ " if (i == vertex_index) \n"
+ " vertex_tex_color = texture2DLod(vertex_tex[i], vec2(0.5), 0.0).xyz; \n"
+ "} \n";
+
+static const char *vs_source_no_textures =
+ "varying vec3 vertex_tex_color; \n"
+ "void main() \n"
+ "{ \n"
+ " gl_Position = gl_Vertex; \n"
+ " vertex_tex_color = vec3(0.0); \n"
+ "} \n";
+
+static const char *fs_source =
+ "#define NUM %i \n"
+ "uniform sampler2D fragment_tex[NUM]; \n"
+ "uniform int fragment_index;"
+ "varying vec3 vertex_tex_color; \n"
+ "void main() \n"
+ "{ \n"
+ " int i; \n"
+ " vec3 fragment_tex_color = vec3(0.0); \n"
+ " for (i = 0; i < NUM; i++) \n"
+ " if (i == fragment_index) \n"
+ " fragment_tex_color = texture2D(fragment_tex[i], vec2(0.5), 0.0).xyz; \n"
+ " gl_FragColor = vec4(fragment_tex_color + vertex_tex_color, 1.0); \n"
+ "} \n";
+
+GLuint prog;
+static int max_vs_textures, max_fs_textures;
+
+static void
+get_texture_color(int unit, float out[3])
+{
+ out[0] = (unit % 16) / 15.0;
+ out[1] = (unit / 16) / 15.0;
+ out[2] = 0;
+}
+
+static void
+set_uniform(GLuint prog, const char *name, int value)
+{
+ GLuint loc = glGetUniformLocation(prog, name);
+ if (loc != -1)
+ glUniform1i(loc, value);
+}
+
+static GLvoid
+draw_rect_core(int ix, int iy, int iw, int ih)
+{
+ float x = -1 + 2.0*ix/piglit_width;
+ float y = -1 + 2.0*iy/piglit_height;
+ float w = 2.0*iw/piglit_width;
+ float h = 2.0*ih/piglit_height;
+ float verts[4][4];
+ GLuint vbo;
+
+ verts[0][0] = x;
+ verts[0][1] = y;
+ verts[0][2] = 0.0;
+ verts[0][3] = 1.0;
+ verts[1][0] = x + w;
+ verts[1][1] = y;
+ verts[1][2] = 0.0;
+ verts[1][3] = 1.0;
+ verts[2][0] = x + w;
+ verts[2][1] = y + h;
+ verts[2][2] = 0.0;
+ verts[2][3] = 1.0;
+ verts[3][0] = x;
+ verts[3][1] = y + h;
+ verts[3][2] = 0.0;
+ verts[3][3] = 1.0;
+
+ glGenBuffers(1, &vbo);
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
+
+ glEnableVertexAttribArray(0);
+ glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
+
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+ glDisableVertexAttribArray(0);
+ glDeleteBuffers(1, &vbo);
+}
+
+static GLboolean
+probe_pixel(int unit, int x, int y)
+{
+ float expected[3];
+
+ get_texture_color(unit, expected);
+
+ if (piglit_probe_pixel_rgb(x, y, expected))
+ return GL_TRUE;
+
+ printf(" When testing texture unit %i\n", unit);
+ return GL_FALSE;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLboolean pass = GL_TRUE;
+ int i, unit, x, y;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ x = 0;
+ y = 0;
+ unit = 0;
+
+ set_uniform(prog, "fragment_index", max_fs_textures);
+ for (i = 0; i < max_vs_textures; i++) {
+ set_uniform(prog, "vertex_index", i);
+ draw_rect_core(x, y, 20, 20);
+ pass = probe_pixel(unit, x+10, y+10) && pass;
+
+ unit++;
+ x += 20;
+ if (x+20 > piglit_width) {
+ x = 0;
+ y += 20;
+ }
+ }
+
+ set_uniform(prog, "vertex_index", max_vs_textures);
+ for (i = 0; i < max_fs_textures; i++) {
+ set_uniform(prog, "fragment_index", i);
+ draw_rect_core(x, y, 20, 20);
+ pass = probe_pixel(unit, x+10, y+10) && pass;
+
+ unit++;
+ x += 20;
+ if (x+20 > piglit_width) {
+ x = 0;
+ y += 20;
+ }
+ }
+
+ piglit_check_gl_error(GL_NO_ERROR);
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+static void
+set_texture(int unit)
+{
+ GLuint tex;
+ float color[3];
+
+ get_texture_color(unit, color);
+
+ glGenTextures(1, &tex);
+ glActiveTexture(GL_TEXTURE0 + unit);
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 1, 1, 0,
+ GL_RGB, GL_FLOAT, color);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ piglit_check_gl_error(GL_NO_ERROR);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ GLuint vs, fs, vao;
+ int max_combined_textures, i, unit;
+ char str[2048];
+
+ /* get limits */
+ glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_fs_textures);
+ glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &max_vs_textures);
+ glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_textures);
+ assert(max_fs_textures <= max_combined_textures);
+
+ max_vs_textures = MIN2(max_vs_textures, max_combined_textures - max_fs_textures);
+
+ /* compile shaders */
+ if (max_vs_textures) {
+ sprintf(str, vs_source, max_vs_textures);
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, str);
+ }
+ else {
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source_no_textures);
+ }
+
+ sprintf(str, fs_source, max_fs_textures);
+ fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, str);
+
+ prog = piglit_link_simple_program(vs, fs);
+ glUseProgram(prog);
+
+ piglit_check_gl_error(GL_NO_ERROR);
+
+ /* initialize textures */
+ unit = 0;
+ for (i = 0; i < max_vs_textures; i++) {
+ char name[64];
+ sprintf(name, "vertex_tex[%i]", i);
+ set_uniform(prog, name, unit);
+ set_texture(unit);
+ unit++;
+ }
+
+ for (i = 0; i < max_fs_textures; i++) {
+ char name[64];
+ sprintf(name, "fragment_tex[%i]", i);
+ set_uniform(prog, name, unit);
+ set_texture(unit);
+ unit++;
+ }
+
+ glClearColor(0.0, 0.0, 1.0, 1.0);
+ glGenVertexArrays(1, &vao);
+ glBindVertexArray(vao);
+
+ piglit_check_gl_error(GL_NO_ERROR);
+}
--
1.7.10.4
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