[Piglit] [PATCH v2 1/7] Test GL_ARB_clear_texture using 3D textures
Neil Roberts
neil at linux.intel.com
Thu Jun 5 09:38:23 PDT 2014
This adds a test for glClearTexSubImage when clearing a sub-region of
a 3D texture. Two sub-regions are cleared, one using a NULL data
parameter and one providing a colour. Both regions have a depth
greater than 1. All of the images of the texture are then rendered to
the window and probed for the correct results.
---
tests/all.py | 1 +
tests/spec/arb_clear_texture/3d.c | 246 +++++++++++++++++++++++++
tests/spec/arb_clear_texture/CMakeLists.gl.txt | 1 +
3 files changed, 248 insertions(+)
create mode 100644 tests/spec/arb_clear_texture/3d.c
diff --git a/tests/all.py b/tests/all.py
index 1652d7c..8df9a0b 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3059,6 +3059,7 @@ add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-zero-size'
arb_clear_texture = {}
spec['ARB_clear_texture'] = arb_clear_texture
add_concurrent_test(arb_clear_texture, 'arb_clear_texture-simple')
+add_concurrent_test(arb_clear_texture, 'arb_clear_texture-3d')
arb_copy_buffer = {}
spec['ARB_copy_buffer'] = arb_copy_buffer
diff --git a/tests/spec/arb_clear_texture/3d.c b/tests/spec/arb_clear_texture/3d.c
new file mode 100644
index 0000000..b7efcb5
--- /dev/null
+++ b/tests/spec/arb_clear_texture/3d.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 2014 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.
+ */
+
+/** @file 3d.c
+ *
+ * A test of using glClearTexSubImage to clear sub-regions of a 3D
+ * texture. A 4x4x4 texture is created with all green data. The region
+ * 1x2x2+1+1+1 is cleared to zeroes by setting the data to NULL and
+ * the region 1x2x2+2+1+1 is cleared to red. All four 4x4 images are
+ * then drawn to the screen in left-to-right order.
+ */
+
+#define TEX_WIDTH 4
+#define TEX_HEIGHT 4
+#define TEX_DEPTH 4
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 20;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const float green[3] = {0.0, 1.0, 0.0};
+static const float red[3] = {1.0, 0.0, 0.0};
+static const float black[3] = {0.0, 0.0, 0.0};
+
+static GLuint
+create_texture(void)
+{
+ GLubyte tex_data[TEX_WIDTH * TEX_HEIGHT * TEX_DEPTH * 3];
+ static const GLubyte green_bytes[3] = { 0x00, 0xff, 0x00 };
+ GLuint tex;
+ int i;
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ for (i = 0; i < TEX_WIDTH * TEX_HEIGHT * TEX_DEPTH; i++)
+ memcpy(tex_data + i * 3, green_bytes, sizeof green_bytes);
+
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_3D, tex);
+ glTexImage3D(GL_TEXTURE_3D,
+ 0, /* level */
+ GL_RGB,
+ TEX_WIDTH, TEX_HEIGHT, TEX_DEPTH,
+ 0, /* border */
+ GL_RGB,
+ GL_UNSIGNED_BYTE,
+ tex_data);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ return tex;
+}
+
+static void
+clear_texture(GLuint tex)
+{
+ glClearTexSubImage(tex,
+ 0, /* level */
+ 1, 1, 1, /* x/y/z */
+ 1, 2, 2, /* width/height/depth */
+ GL_RGB,
+ GL_UNSIGNED_BYTE,
+ NULL);
+ glClearTexSubImage(tex,
+ 0, /* level */
+ 2, 1, 1, /* x/y/z */
+ 1, 2, 2, /* width/height/depth */
+ GL_RGB,
+ GL_FLOAT,
+ red);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+}
+
+static void
+init_program(void)
+{
+ GLuint prog;
+ GLuint uniform;
+
+ static const char vs_source[] =
+ "attribute vec2 piglit_vertex;\n"
+ "attribute vec3 piglit_texcoord;\n"
+ "uniform vec2 fb_size;\n"
+ "varying vec3 tex_coord;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = vec4(piglit_vertex * 2.0 /\n"
+ " fb_size - 1.0,\n"
+ " 0.0, 1.0);\n"
+ " tex_coord = piglit_texcoord;\n"
+ "}\n";
+ static const char fs_source[] =
+ "uniform sampler3D tex;\n"
+ "varying vec3 tex_coord;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_FragColor = texture3D(tex, tex_coord);\n"
+ "}\n";
+
+ prog = piglit_build_simple_program(vs_source, fs_source);
+
+ glUseProgram(prog);
+
+ uniform = glGetUniformLocation(prog, "tex");
+ glUniform1i(uniform, 0);
+
+ uniform = glGetUniformLocation(prog, "fb_size");
+ glUniform2f(uniform, piglit_width, piglit_height);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ /* glClearTexture is either in the GL_ARB_clear_texture
+ * extension or in core in GL 4.4
+ */
+ if (piglit_get_gl_version() < 44 &&
+ !piglit_is_extension_supported("GL_ARB_clear_texture")) {
+ printf("OpenGL 4.4 or GL_ARB_clear_texture is required.\n");
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ init_program();
+}
+
+static void
+draw_rect(float x, float y, float width, float height, float tex_z)
+{
+ struct {
+ float x, y;
+ float tx, ty, tz;
+ } attribs[] = {
+ { x, y, 0.0f, 0.0f, tex_z },
+ { x + width, y, 1.0f, 0.0f, tex_z },
+ { x, y + height, 0.0f, 1.0f, tex_z },
+ { x + width, y + height, 1.0f, 1.0f, tex_z },
+ };
+
+ glEnableVertexAttribArray(PIGLIT_ATTRIB_POS);
+ glVertexAttribPointer(PIGLIT_ATTRIB_POS,
+ 2, /* size */
+ GL_FLOAT,
+ GL_FALSE, /* normalized */
+ sizeof attribs[0],
+ &attribs[0].x);
+ glEnableVertexAttribArray(PIGLIT_ATTRIB_TEX);
+ glVertexAttribPointer(PIGLIT_ATTRIB_TEX,
+ 3, /* size */
+ GL_FLOAT,
+ GL_FALSE, /* normalized */
+ sizeof attribs[0],
+ &attribs[0].tx);
+
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ glDisableVertexAttribArray(PIGLIT_ATTRIB_POS);
+ glDisableVertexAttribArray(PIGLIT_ATTRIB_TEX);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+ GLuint tex;
+ int i;
+
+ tex = create_texture();
+
+ clear_texture(tex);
+
+ glBindTexture(GL_TEXTURE_3D, tex);
+
+ /* Render all of the images to the screen */
+ for (i = 0; i < TEX_DEPTH; i++) {
+ draw_rect(i * TEX_WIDTH, 0.0, /* x/y */
+ TEX_WIDTH, TEX_HEIGHT,
+ i / (TEX_DEPTH - 1.0f));
+ }
+
+ glBindTexture(GL_TEXTURE_3D, 0);
+
+ glDeleteTextures(1, &tex);
+
+ /* First image is all green */
+ pass &= piglit_probe_rect_rgb(0, 0, 4, 4, green);
+
+ /* Second image is green with with a short black and red bar
+ * in the middle */
+ pass &= piglit_probe_rect_rgb(4, 0, 1, 4, green);
+ pass &= piglit_probe_pixel_rgb(5, 0, green);
+ pass &= piglit_probe_rect_rgb(5, 1, 1, 2, black);
+ pass &= piglit_probe_pixel_rgb(5, 3, green);
+ pass &= piglit_probe_pixel_rgb(6, 0, green);
+ pass &= piglit_probe_rect_rgb(6, 1, 1, 2, red);
+ pass &= piglit_probe_pixel_rgb(6, 3, green);
+ pass &= piglit_probe_rect_rgb(7, 0, 1, 4, green);
+ /* Third image is the same */
+ pass &= piglit_probe_rect_rgb(8, 0, 1, 4, green);
+ pass &= piglit_probe_pixel_rgb(9, 0, green);
+ pass &= piglit_probe_rect_rgb(9, 1, 1, 2, black);
+ pass &= piglit_probe_pixel_rgb(9, 3, green);
+ pass &= piglit_probe_pixel_rgb(10, 0, green);
+ pass &= piglit_probe_rect_rgb(10, 1, 1, 2, red);
+ pass &= piglit_probe_pixel_rgb(10, 3, green);
+ pass &= piglit_probe_rect_rgb(11, 0, 1, 4, green);
+
+ /* Fourth image is all green */
+ pass &= piglit_probe_rect_rgb(12, 0, 4, 4, green);
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
diff --git a/tests/spec/arb_clear_texture/CMakeLists.gl.txt b/tests/spec/arb_clear_texture/CMakeLists.gl.txt
index c77fd79..75ac54c 100644
--- a/tests/spec/arb_clear_texture/CMakeLists.gl.txt
+++ b/tests/spec/arb_clear_texture/CMakeLists.gl.txt
@@ -9,5 +9,6 @@ link_libraries (
)
piglit_add_executable (arb_clear_texture-simple simple.c)
+piglit_add_executable (arb_clear_texture-3d 3d.c)
# vim: ft=cmake:
--
1.9.0
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