[Piglit] [PATCH] arb_texture_stencil8: add rendering test (v2)
Dave Airlie
airlied at gmail.com
Sat Apr 4 22:55:41 PDT 2015
This is based on ARB_stencil_texturing draw.c except
it only tests stencil texturing.
It's also forward ported to core profile.
v2: fix test comment (Chris)
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
tests/spec/arb_texture_stencil8/CMakeLists.gl.txt | 1 +
tests/spec/arb_texture_stencil8/draw.c | 215 ++++++++++++++++++++++
2 files changed, 216 insertions(+)
create mode 100644 tests/spec/arb_texture_stencil8/draw.c
diff --git a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
index ac1653a..6a870f0 100644
--- a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
+++ b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
@@ -10,5 +10,6 @@ link_libraries (
)
piglit_add_executable (arb_texture_stencl8-stencil-texture stencil-texture.c)
+piglit_add_executable (arb_texture_stencl8-draw draw.c)
# vim: ft=cmake:
diff --git a/tests/spec/arb_texture_stencil8/draw.c b/tests/spec/arb_texture_stencil8/draw.c
new file mode 100644
index 0000000..19376de
--- /dev/null
+++ b/tests/spec/arb_texture_stencil8/draw.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ * Copyright © 2015 Red Hat
+ *
+ * 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 draw.c
+ *
+ * A basic drawing test for GL_ARB_texture_stencil8 which ensures that
+ * sampling occurs from the right position in the texture.
+ *
+ * It creates two stencil textures. The first has a horizontal
+ * gradient (0 -> 255 for stencil), and the second a
+ * vertical gradient.
+ *
+ * The expected output is two squares, separated by a blue border.
+ * The left half of the window is generated by stencil texturing, and drawn
+ * in red.
+ *
+ * Stencil
+ * (red)
+ *
+ * 0 --> 1
+ * --------
+ * 1
+ * ^
+ * |
+ * 0
+ */
+
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_core_version = 32;
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+ config.window_width = 256 + 3;
+ config.window_height = 256 * 2 + 3;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+float stencil_horiz_expected[256 * 256 * 3];
+float stencil_vert_expected[256 * 256 * 3];
+
+GLuint horiz_tex;
+GLuint vert_tex;
+
+/** A program that samples from stencil using usampler2D. */
+GLint stencil_prog;
+
+GLuint vao;
+
+/******************************************************************************/
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+
+ glClearColor(0.0, 0.0, 1.0, 1.0);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glUseProgram(stencil_prog);
+
+ /* Upper left corner: Stencil (black to red, left to right). */
+ glViewport(0, 259, 256, 256);
+ glBindTexture(GL_TEXTURE_2D, horiz_tex);
+ piglit_draw_rect(-1, -1, 2, 2);
+ if (!piglit_probe_image_rgb(0, 259, 256, 256, stencil_horiz_expected)) {
+ printf(" FAIL: stencil (horizontal).\n");
+ pass = false;
+ }
+
+
+ /* Lower left corner: Stencil (black to red, upwards). */
+ glViewport(0, 0, 256, 256);
+ glBindTexture(GL_TEXTURE_2D, vert_tex);
+ piglit_draw_rect(-1, -1, 2, 2);
+ if (!piglit_probe_image_rgb(0, 0, 256, 256, stencil_vert_expected)) {
+ printf(" FAIL: stencil (vertical).\n");
+ pass = false;
+ }
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+/******************************************************************************/
+
+/*
+ * - Stencil ranges from 0 to 255.
+ *
+ * horiz_tex is left to right (increasing in the +x direction);
+ * vert_tex is bottom to top (increasing in the +y direction).
+ *
+ * Also set up expected values.
+ */
+static void
+setup_textures(void)
+{
+ int i;
+ uint8_t horiz_data[256 * 256];
+ uint8_t vert_data[256 * 256];
+
+ for (i = 0; i < ARRAY_SIZE(horiz_data); i++) {
+ unsigned x = i % 256;
+ unsigned y = i / 256;
+ horiz_data[i] = x;
+ vert_data[i] = y;
+ }
+
+ glGenTextures(1, &horiz_tex);
+ glBindTexture(GL_TEXTURE_2D, horiz_tex);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8,
+ 256, 256, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
+ horiz_data);
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ glGenTextures(1, &vert_tex);
+ glBindTexture(GL_TEXTURE_2D, vert_tex);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8,
+ 256, 256, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
+ vert_data);
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ /* Set up expected values. */
+ memset(stencil_horiz_expected, 0, sizeof(stencil_horiz_expected));
+ memset(stencil_vert_expected, 0, sizeof(stencil_vert_expected));
+
+ for (i = 0; i < 256 * 256; i++) {
+ unsigned x = i % 256;
+ unsigned y = i / 256;
+ stencil_horiz_expected[3*i] = x / 255.0f;
+ stencil_vert_expected[3*i] = y / 255.0f;
+ }
+
+
+}
+
+/**
+ * Compile the shaders used by this program.
+ *
+ */
+static void
+setup_shaders(void)
+{
+ int loc;
+
+ const char *vs =
+ "#version 330\n"
+ "in vec4 piglit_vertex;\n"
+ "out vec2 texcoords;\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = piglit_vertex;\n"
+ " texcoords = (piglit_vertex.xy + 1.0) / 2.0;\n"
+ "}\n";
+
+ const char *fs_stencil =
+ "#version 330\n"
+ "in vec2 texcoords;\n"
+ "uniform usampler2D tex;\n"
+ "void main()\n"
+ "{\n"
+ " uint stencil = texture(tex, texcoords).x;\n"
+ " gl_FragColor = vec4(float(stencil) / 255.0, 0, 0, 1);\n"
+ "}\n";
+
+ stencil_prog = piglit_build_simple_program(vs, fs_stencil);
+ loc = glGetUniformLocation(stencil_prog, "tex");
+ glUseProgram(stencil_prog);
+ glUniform1i(loc, 0);
+
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ piglit_require_extension("GL_ARB_texture_stencil8");
+ piglit_require_extension("GL_ARB_stencil_texturing");
+ piglit_require_GLSL_version(330);
+
+ glGenVertexArrays(1, &vao);
+ glBindVertexArray(vao);
+ setup_textures();
+ setup_shaders();
+}
--
1.9.3
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