[Piglit] [PATCH piglit] GL_ARB_texture_multisample: Test using glClear with a ms render target
Neil Roberts
neil at linux.intel.com
Thu Jun 12 03:53:57 PDT 2014
This creates a mulitsample texture and tries clearing it with glClear
via a framebuffer. One of the clears covers the entire texture and the
other is clipped to the right half of the texture using a scissor.
On the i965 driver the clear that covers the whole of the texture
wasn't working in Mesa before commit 765efeef883cdbb86e052acd887e0c3.
https://bugs.freedesktop.org/show_bug.cgi?id=79729
---
tests/all.py | 1 +
.../spec/arb_texture_multisample/CMakeLists.gl.txt | 1 +
tests/spec/arb_texture_multisample/clear.c | 223 +++++++++++++++++++++
3 files changed, 225 insertions(+)
create mode 100644 tests/spec/arb_texture_multisample/clear.c
diff --git a/tests/all.py b/tests/all.py
index 3830013..2740edb 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1383,6 +1383,7 @@ add_concurrent_test(arb_texture_multisample, 'arb_texture_multisample-sample-mas
add_concurrent_test(arb_texture_multisample, 'arb_texture_multisample-negative-max-samples')
add_concurrent_test(arb_texture_multisample, 'arb_texture_multisample-teximage-3d-multisample')
add_concurrent_test(arb_texture_multisample, 'arb_texture_multisample-teximage-2d-multisample')
+add_concurrent_test(arb_texture_multisample, 'arb_texture_multisample-clear')
for stage in ['vs', 'gs', 'fs']:
# textureSize():
diff --git a/tests/spec/arb_texture_multisample/CMakeLists.gl.txt b/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
index 0f00e72..d804d9d 100644
--- a/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
+++ b/tests/spec/arb_texture_multisample/CMakeLists.gl.txt
@@ -21,4 +21,5 @@ piglit_add_executable (arb_texture_multisample-negative-max-samples negative-max
piglit_add_executable (arb_texture_multisample-sample-position sample-position.c)
piglit_add_executable (arb_texture_multisample-teximage-2d-multisample teximage-2d-multisample.c)
piglit_add_executable (arb_texture_multisample-teximage-3d-multisample teximage-3d-multisample.c)
+piglit_add_executable (arb_texture_multisample-clear clear.c)
# vim: ft=cmake:
diff --git a/tests/spec/arb_texture_multisample/clear.c b/tests/spec/arb_texture_multisample/clear.c
new file mode 100644
index 0000000..8015c33
--- /dev/null
+++ b/tests/spec/arb_texture_multisample/clear.c
@@ -0,0 +1,223 @@
+/*
+ * 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 clear.c
+ *
+ * A test of using glClear with a framebuffer bound to a multisample
+ * texture. An 8x8 multisample texture is created with 4 samples. The
+ * whole texture is cleared to red and then the right half of it is
+ * cleared to green using a scissor. The texture is then drawn at
+ * 16x16 so that every sample of every texel can be drawn using a
+ * special shader. The values are then compared to check that all of
+ * the samples are cleared.
+ */
+
+#define TEX_WIDTH 8
+#define TEX_HEIGHT 8
+#define TEX_SAMPLES 4
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 21;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const float red[4] = {1.0, 0.0, 0.0, 1.0};
+static const float green[4] = {0.0, 1.0, 0.0, 1.0};
+
+static GLuint
+create_texture(void)
+{
+ GLuint tex;
+
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+ glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE,
+ TEX_SAMPLES,
+ GL_RGBA,
+ TEX_WIDTH, TEX_HEIGHT,
+ GL_FALSE /* fixedsamplelocations */);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ return tex;
+}
+
+static void
+clear_texture(GLuint tex)
+{
+ GLuint fb;
+
+ glGenFramebuffers(1, &fb);
+ glBindFramebuffer(GL_FRAMEBUFFER, fb);
+ glFramebufferTexture2D(GL_FRAMEBUFFER,
+ GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D_MULTISAMPLE,
+ tex,
+ 0 /* layer */);
+ assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) ==
+ GL_FRAMEBUFFER_COMPLETE);
+
+ /* Clear the entire texture to red */
+ glClearColor(1.0, 0.0, 0.0, 1.0);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ /* Clear the right half to green */
+ glClearColor(0.0, 1.0, 0.0, 1.0);
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(TEX_WIDTH / 2, 0, TEX_WIDTH / 2, TEX_HEIGHT);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glDisable(GL_SCISSOR_TEST);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glDeleteFramebuffers(1, &fb);
+
+ 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[] =
+ "#version 130\n"
+ "in vec2 piglit_vertex;\n"
+ "uniform vec2 fb_size;\n"
+ "out vec2 sample_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"
+ " sample_coord = piglit_vertex;\n"
+ "}\n";
+ static const char fs_source[] =
+ "#version 130\n"
+ "#extension GL_ARB_texture_multisample : enable\n"
+ "uniform sampler2DMS tex;\n"
+ "in vec2 sample_coord;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " ivec2 isample_coord = ivec2(sample_coord);\n"
+ " ivec2 tex_coord = isample_coord / 2;\n"
+ " int sample = ((isample_coord.x & 1) * 2 +\n"
+ " (isample_coord.y & 1));\n"
+ " gl_FragColor = texelFetch(tex, tex_coord, sample);\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)
+{
+ GLint maxColorTextureSamples;
+
+ piglit_require_extension("GL_ARB_texture_multisample");
+ piglit_require_extension("GL_ARB_framebuffer_object");
+ piglit_require_GLSL_version(130);
+
+ /* We need to support multisample textures with at least 4
+ * samples */
+ glGetIntegerv(GL_MAX_COLOR_TEXTURE_SAMPLES, &maxColorTextureSamples);
+ if (maxColorTextureSamples < TEX_SAMPLES) {
+ printf("At least %i texture samples are required\n",
+ TEX_SAMPLES);
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ init_program();
+}
+
+static void
+draw_tex(GLuint tex)
+{
+ static const struct {
+ float x, y;
+ } attribs[] = {
+ { 0.0f, 0.0f },
+ { TEX_WIDTH * 2.0f, 0.0f },
+ { 0.0f, TEX_HEIGHT * 2.0f },
+ { TEX_WIDTH * 2, TEX_HEIGHT * 2.0f },
+ };
+
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+
+ glEnableVertexAttribArray(PIGLIT_ATTRIB_POS);
+ glVertexAttribPointer(PIGLIT_ATTRIB_POS,
+ 2, /* size */
+ GL_FLOAT,
+ GL_FALSE, /* normalized */
+ sizeof attribs[0],
+ &attribs[0].x);
+
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ glDisableVertexAttribArray(PIGLIT_ATTRIB_POS);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+ GLuint tex;
+
+ tex = create_texture();
+
+ clear_texture(tex);
+
+ draw_tex(tex);
+
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, 0);
+
+ glDeleteTextures(1, &tex);
+
+ /* Left half is red */
+ pass &= piglit_probe_rect_rgb(0, 0, TEX_WIDTH, TEX_HEIGHT * 2, red);
+ /* Right half is green */
+ pass &= piglit_probe_rect_rgb(TEX_WIDTH, 0,
+ TEX_WIDTH, TEX_HEIGHT * 2,
+ green);
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.9.3
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