GL_ARB_framebuffer_object (unlike GL_EXT_framebuffer_object) allows
the FBO attachments to be off different sizes. AFAICT, we had no
tests to exercise rendering with mixed buffer sizes.
---
tests/all.py | 1 +
.../spec/arb_framebuffer_object/CMakeLists.gl.txt | 1 +
.../arb_framebuffer_object/mixed-buffer-sizes.c | 175 +++++++++++++++++++++
3 files changed, 177 insertions(+)
create mode 100644 tests/spec/arb_framebuffer_object/mixed-buffer-sizes.c
diff --git a/tests/all.py b/tests/all.py
index 9bdb8ed..12dcca4 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1940,6 +1940,7 @@ with profile.group_manager(
g(['fbo-scissor-blit', 'window'], 'fbo-scissor-blit window',
run_concurrent=False)
g(['fbo-tex-rgbx'], 'fbo-tex-rgbx')
+ g(['arb_framebuffer_object-mixed-buffer-sizes'],
g(['arb_framebuffer_object-negative-readpixels-no-rb'],
'negative-readpixels-no-rb')
g(['fbo-drawbuffers-none', 'glClear'])
diff --git a/tests/spec/arb_framebuffer_object/CMakeLists.gl.txt
b/tests/spec/arb_framebuffer_object/CMakeLists.gl.txt
index f20f055..e2cb8c2 100644
--- a/tests/spec/arb_framebuffer_object/CMakeLists.gl.txt
+++ b/tests/spec/arb_framebuffer_object/CMakeLists.gl.txt
@@ -12,6 +12,7 @@ link_libraries (
piglit_add_executable(framebuffer-blit-levels framebuffer-blit-levels.c)
piglit_add_executable(get-renderbuffer-internalformat
get-renderbuffer-internalformat.c)
+piglit_add_executable(arb_framebuffer_object-mixed-buffer-sizes
mixed-buffer-sizes.c)
piglit_add_executable(arb_framebuffer_object-negative-readpixels-no-rb
negative-readpixels-no-rb.c)
piglit_add_executable(same-attachment-glFramebufferTexture2D-GL_DEPTH_STENCIL_ATTACHMENT
same-attachment-glFramebufferTexture2D-GL_DEPTH_STENCIL_ATTACHMENT.c)
piglit_add_executable(same-attachment-glFramebufferRenderbuffer-GL_DEPTH_STENCIL_ATTACHMENT
same-attachment-glFramebufferRenderbuffer-GL_DEPTH_STENCIL_ATTACHMENT.c)
diff --git a/tests/spec/arb_framebuffer_object/mixed-buffer-sizes.c
b/tests/spec/arb_framebuffer_object/mixed-buffer-sizes.c
new file mode 100644
index 0000000..dcdf8f1
--- /dev/null
+++ b/tests/spec/arb_framebuffer_object/mixed-buffer-sizes.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright © 2015 VMware, Inc.
+ *
+ * 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.
+ */
+
+/**
+ * Check that an FBO with different renderbuffer/texture sizes works
+ * as expected. If the color and depth buffers aren't the same size,
+ * the rendering in the intersection area should be valid.
+ *
+ * \author Brian Paul
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 10;
+ config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static GLubyte *RefImage = NULL;
+
+
+
+static void
+display_image(int w, int h, const GLubyte *testImage)
+{
+ glDisable(GL_DEPTH_TEST);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glDrawPixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, testImage);
+ piglit_present_results();
+ glEnable(GL_DEPTH_TEST);
+}
+
+
+/**
+ * Render image with given color buffer, depth buffer and viewport sizes.
+ */
+static bool
+render_mixed_fbo(GLsizei colorW, GLsizei colorH,
+ GLsizei depthW, GLsizei depthH,
+ GLsizei vpW, GLsizei vpH)
+{
+ GLubyte *results;
+ GLuint fb, rb[2];
+ GLenum status;
+ bool pass = true;
+ int sizeInBytes = vpW * vpH * 4;
+
+ glGenFramebuffers(1, &fb);
+ glBindFramebuffer(GL_FRAMEBUFFER, fb);
+ glGenRenderbuffers(2, rb);
+
+ /* setup rb[0] for color */
+ glBindRenderbuffer(GL_RENDERBUFFER, rb[0]);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, colorW, colorH);
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_RENDERBUFFER, rb[0]);
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ /* setup rb[0] for depth */
+ glBindRenderbuffer(GL_RENDERBUFFER, rb[1]);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT,
+ depthW, depthH);
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
+ GL_RENDERBUFFER, rb[1]);
+ if (!piglit_check_gl_error(GL_NO_ERROR))
+ piglit_report_result(PIGLIT_FAIL);
+
+ status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+ if (status != GL_FRAMEBUFFER_COMPLETE) {
+ fprintf(stderr,
+ "Framebuffer incomplete (status %s)\n",
+ piglit_get_gl_enum_name(status));
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ glViewport(0, 0, vpW, vpH);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glBegin(GL_TRIANGLES);
+ /* large triangle */
+ glColor3f(1, 0, 0);
+ glVertex2f(-1, -1);
+ glColor3f(0, 1, 0);
+ glVertex2f(1, -1);
+ glColor3f(0, 0, 1);
+ glVertex2f(0, 1);
+ /* intersecting triangle (to test depth testing) */
+ glColor3f(1, 1, 1);
+ glVertex3f(-1,-1, -1);
+ glVertex3f(-1, 1, -1);
+ glVertex3f(1, 0, 1);
+ glEnd();
+
+ results = malloc(vpW * vpH * 4);
+ glReadPixels(0, 0, vpW, vpH, GL_RGBA, GL_UNSIGNED_BYTE, results);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glDeleteRenderbuffers(2, rb);
+ glDeleteFramebuffers(1, &fb);
+
+ if (RefImage) {
+ /* compare against reference image */
+ if (memcmp(RefImage, results, sizeInBytes)) {
+ printf("Rendering failure with:\n");
+ printf(" color buffer %d x %d\n", colorW, colorH);
+ printf(" depth buffer %d x %d\n", depthW, depthH);
+ pass = false;
+ display_image(vpW, vpH, results);
+ }
+ free(results);
+ }
+ else {
+ /* save this as the reference image */
+ RefImage = results;
+ }
+
+ return pass;
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ const int w = 120, h = 100;
+ bool pass = true;
+
+ /* Create reference image */
+ pass = render_mixed_fbo(w, h, w, h, w, h);
+
+ /* Render mixed buffers: larger color, smaller depth */
+ pass = render_mixed_fbo(170, 103, w, h, w, h) && pass;
+
+ /* Render mixed buffers: smaller color, larger depth */
+ pass = render_mixed_fbo(w, h, 175, 109, w, h) && pass;
+
+ /* Render mixed buffers: taller color, wider depth */
+ pass = render_mixed_fbo(w, 199, 177, h, w, h) && pass;
+
+ if (pass)
+ display_image(w, h, RefImage);
+
+ free(RefImage);
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ piglit_require_extension("GL_ARB_framebuffer_object");
+ glClearColor(0.25, 0.25, 0.25, 1.0);
+ glEnable(GL_DEPTH_TEST);
+}
--
1.9.1
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