[Piglit] [PATCH] gl-3.2: add layered rendering test doing clipping
sroland at vmware.com
sroland at vmware.com
Thu Dec 3 17:40:55 PST 2015
From: Roland Scheidegger <sroland at vmware.com>
This is more of a clip test involving the system-interpreted values (which
cannot be interpolated). This exposes some problems in gallium for drivers
using draw, where clipping such values was completely broken, thus layered
rendering being generally quite broken in practice (viewport index isn't
tested here but should follow all the same logic).
The test itself is a cut down (we're definitely not interested in different
texture types here, albeit different primitives would be worth testing for)
and modified copy of gl-layer-render, just making sure the rectangle extends
beyond vp bounds. Also testing both provoking vertex conventions, albeit
not mean as it would be possible to only supply the correct layer to one
vertex if the result of GL_LAYER_PROVOKING_VERTEX isn't GL_UNDEFINED_VERTEX.
---
tests/all.py | 1 +
.../gl-3.2/layered-rendering/CMakeLists.gl.txt | 1 +
.../layered-rendering/gl-layer-render-clipped.c | 216 +++++++++++++++++++++
3 files changed, 218 insertions(+)
create mode 100644 tests/spec/gl-3.2/layered-rendering/gl-layer-render-clipped.c
diff --git a/tests/all.py b/tests/all.py
index 9f1b4f3..a69d7c3 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1252,6 +1252,7 @@ with profile.group_manager(
g(['gl-3.2-layered-rendering-gl-layer-not-layered'],
'gl-layer-not-layered')
g(['gl-3.2-layered-rendering-gl-layer-render'], 'gl-layer-render')
+ g(['gl-3.2-layered-rendering-gl-layer-render-clipped'], 'gl-layer-render-clipped')
g(['gl-3.2-layered-rendering-gl-layer-render-storage'], 'gl-layer-render-storage')
for texture_type in ['3d', '2d_array', '2d_multisample_array', '1d_array',
diff --git a/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt b/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
index a35720d..468dc22 100644
--- a/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.2/layered-rendering/CMakeLists.gl.txt
@@ -25,5 +25,6 @@ piglit_add_executable (gl-3.2-layered-rendering-gl-layer gl-layer.c)
piglit_add_executable (gl-3.2-layered-rendering-gl-layer-cube-map gl-layer-cube-map.c)
piglit_add_executable (gl-3.2-layered-rendering-gl-layer-not-layered gl-layer-not-layered.c)
piglit_add_executable (gl-3.2-layered-rendering-gl-layer-render gl-layer-render.c)
+piglit_add_executable (gl-3.2-layered-rendering-gl-layer-render-clipped gl-layer-render-clipped.c)
piglit_add_executable (gl-3.2-layered-rendering-gl-layer-render-storage gl-layer-render-storage.c)
# vim: ft=cmake:
diff --git a/tests/spec/gl-3.2/layered-rendering/gl-layer-render-clipped.c b/tests/spec/gl-3.2/layered-rendering/gl-layer-render-clipped.c
new file mode 100644
index 0000000..015a619
--- /dev/null
+++ b/tests/spec/gl-3.2/layered-rendering/gl-layer-render-clipped.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright © 2013 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 gl-layer-render-clipped.c
+ * This tests correct passing of layer to post-clip stages (when clipping
+ * is needed). This parameter must not be interpolated in clip (there's no
+ * corresponding fs input from where the interpolation info could be taken).
+ * And clipping needs to make sure the right value is copied to the right
+ * vertex. We'll test both first and last provoking vertex convention (albeit
+ * we use the same layer for all vertices as we don't use
+ * GL_LAYER_PROVOKING_VERTEX query). (Could also test vp index)
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 32;
+ config.supports_gl_core_version = 32;
+
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+
+const char *vs_source = {
+ "#version 150\n"
+ "in vec4 piglit_vertex;\n"
+ "out vec4 vert;\n"
+ "void main() {\n"
+ " gl_Position = piglit_vertex;\n"
+ " vert = piglit_vertex;\n"
+ "}\n"
+};
+
+/*
+ * Use the same layer for all tris. A meaner test could use only the correct
+ * layer for the "right" vertex, depending on GL_LAYER_PROVOKING_VERTEX query.
+ */
+const char *gs_source = {
+ "#version 150\n"
+ "layout(triangles) in;\n"
+ "layout(triangle_strip, max_vertices = 3) out;\n"
+ "in vec4 vert[3];\n"
+ "uniform int layer;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " for(int i = 0; i < 3; i++) {\n"
+ " gl_Position = vert[i];\n"
+ " gl_Layer = layer;\n"
+ " EmitVertex();\n"
+ " }\n"
+ "}\n"
+};
+
+const char *fs_source = {
+ "#version 150\n"
+ "uniform vec3 color;\n"
+ "void main() {\n"
+ " gl_FragColor = vec4(color.xyz, 1.);\n"
+ "}\n"
+};
+
+static GLuint layer_uniform;
+static GLuint color_uniform;
+
+GLuint
+create_bind_texture() {
+ int i;
+ GLuint texture;
+ glGenTextures(1, &texture);
+ glBindTexture(GL_TEXTURE_2D_ARRAY, texture);
+
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_R, GL_REPEAT);
+ glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGB, 6, 6, 6, 0, GL_RGB,
+ GL_FLOAT, NULL);
+
+ return texture;
+}
+
+bool check_framebuffer_status(GLenum target, GLenum expected) {
+ GLenum observed = glCheckFramebufferStatus(target);
+ if(expected != observed) {
+ printf("Unexpected framebuffer status!\n"
+ " Observed: %s\n Expected: %s\n",
+ piglit_get_gl_enum_name(observed),
+ piglit_get_gl_enum_name(expected));
+ return false;
+ }
+ return true;
+}
+
+
+bool
+probe_texture_layered_rgb(GLuint texture, int x, int y,
+ int z, int w, int h, int d, float *expected)
+{
+ int k;
+ GLuint fbo;
+
+ glGenFramebuffers(1, &fbo);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+ for(k = 0; k < d; k++ ) {
+ glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ texture, 0, k+z);
+
+ if(!piglit_probe_rect_rgb(0, 0, w, h, &expected[k*3])) {
+ printf("Layer: %i\n", k);
+ return false;
+ }
+ }
+ return true;
+}
+
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ int i, j;
+ bool pass = true;
+ GLuint fbo, texture, program;
+
+ float colors[6*3] = {
+ 0, 0, 1,
+ 0, 1, 0,
+ 0, 1, 1,
+ 1, 0, 0,
+ 1, 0, 1,
+ 1, 1, 0
+ };
+
+ program = piglit_build_simple_program_multiple_shaders(
+ GL_VERTEX_SHADER, vs_source,
+ GL_GEOMETRY_SHADER, gs_source,
+ GL_FRAGMENT_SHADER, fs_source,
+ 0);
+ glUseProgram(program);
+
+ /* Retrieve index from vs */
+ color_uniform = glGetUniformLocation(program, "color");
+ layer_uniform = glGetUniformLocation(program, "layer");
+
+ /* Gen textures */
+ glGenFramebuffers(1, &fbo);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+ texture = create_bind_texture();
+ glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ texture, 0);
+
+ if(!check_framebuffer_status(GL_FRAMEBUFFER,
+ GL_FRAMEBUFFER_COMPLETE) ||
+ !piglit_check_gl_error(GL_NO_ERROR)) {
+ printf("Error with setup\n");
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ /* draw quad on each layer with set color*/
+ glProvokingVertex(GL_LAST_VERTEX_CONVENTION);
+ for(j = 0; j < 6; j++) {
+ if (j == 3) {
+ glProvokingVertex(GL_FIRST_VERTEX_CONVENTION);
+ }
+ glUniform1i(layer_uniform, j);
+ glUniform3fv(color_uniform, 1, &colors[j*3]);
+ /* rect larger than vp */
+ piglit_draw_rect(-2, -2, 4, 4);
+ }
+
+ pass = probe_texture_layered_rgb(texture,
+ 0, 0, 0, 6, 6, 6, colors) && pass;
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ /* Clean up */
+ glDeleteTextures(1, &texture);
+ glDeleteFramebuffers(1, &fbo);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ /* UNREACHABLE */
+ return PIGLIT_FAIL;
+}
--
2.1.4
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