summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt1
-rw-r--r--tests/spec/ext_framebuffer_multisample/blit-scaled.cpp375
2 files changed, 376 insertions, 0 deletions
diff --git a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
index 1542b920f..8143497f0 100644
--- a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
+++ b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
@@ -23,6 +23,7 @@ piglit_add_executable (ext_framebuffer_multisample-alpha-to-one-single-sample-bu
draw-buffers-common.cpp alpha-to-one-single-sample-buffer.cpp)
piglit_add_executable (ext_framebuffer_multisample-bitmap common.cpp bitmap.cpp)
piglit_add_executable (ext_framebuffer_multisample-blit-flipped common.cpp blit-flipped.cpp)
+piglit_add_executable (ext_framebuffer_multisample-blit-scaled common.cpp blit-scaled.cpp)
piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-samples common.cpp blit-mismatched-samples.cpp)
piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-sizes common.cpp blit-mismatched-sizes.cpp)
piglit_add_executable (ext_framebuffer_multisample-blit-mismatched-formats common.cpp blit-mismatched-formats.cpp)
diff --git a/tests/spec/ext_framebuffer_multisample/blit-scaled.cpp b/tests/spec/ext_framebuffer_multisample/blit-scaled.cpp
new file mode 100644
index 000000000..a34da7135
--- /dev/null
+++ b/tests/spec/ext_framebuffer_multisample/blit-scaled.cpp
@@ -0,0 +1,375 @@
+/*
+ * 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 blit-scaled.cpp
+ *
+ * This test verifies the accuracy of scaled blitting from a multisampled
+ * buffer to a single-sampled buffer by comparing the output from following
+ * rendering scenarios:
+ * 1. Scaled blit using EXT_multisample_framebuffer_blit_scaled.
+ * 2. Scaled blit using glsl shader program.
+ *
+ * Note: This test is specific to Intel's implementation of extension
+ * EXT_multisample_framebuffer_blit_scaled and may not produce expected
+ * results on other hardware. Currently test passes with all of the scaling
+ * factors between 0.1 to 2.5 on Intel's i965 drivers and NVIDIA's proprietary
+ * linux drivers.
+ */
+
+#include "common.h"
+
+const int pattern_width = 258; const int pattern_height = 258;
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 10;
+
+ config.window_width = pattern_width * 2;
+ config.window_height = pattern_height;
+ config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static int num_samples;
+static TestPattern *test_pattern;
+static unsigned prog, vao, vertex_buf;
+const float srcX0 = 6, srcY0 = 7, dstX0 = 0, dstY0 = 0;
+const float srcX1 = pattern_width / 2, srcY1 = pattern_height / 2;
+static Fbo multisampled_tex, multisampled_fbo, singlesampled_fbo;
+
+static void
+print_usage_and_exit(char *prog_name)
+{
+ printf("Usage: %s <num_samples>\n", prog_name);
+ piglit_report_result(PIGLIT_FAIL);
+}
+
+void
+compile_shader(void)
+{
+ static const char *vert =
+ "#version 130\n"
+ "uniform mat4 proj;\n"
+ "in vec2 pos;\n"
+ "in vec2 texCoord;\n"
+ "out vec2 textureCoord;\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = proj * vec4(pos, 0.0, 1.0);\n"
+ " textureCoord = texCoord;\n"
+ "}\n";
+ /* Bilinear filtering of samples using shader program */
+ static const char *frag =
+ "#version 130\n"
+ "#extension GL_ARB_texture_multisample : require\n"
+ "in vec2 textureCoord;\n"
+ "uniform sampler2DMS ms_tex;\n"
+ "uniform int samples;\n"
+ "uniform float xmin;\n"
+ "uniform float ymin;\n"
+ "uniform float xmax;\n"
+ "uniform float ymax;\n"
+ "out vec4 out_color;\n"
+ "void main()\n"
+ "{\n"
+ " float x_f, y_f;\n"
+ " vec4 s_0, s_1, s_2, s_3;\n"
+ " vec2 s_0_coord, s_1_coord, s_2_coord, s_3_coord;\n"
+ " float x_scale = 2.0;\n"
+ " float y_scale = samples / 2.0;\n"
+ " int sample_map[8] = int[8](5 , 2, 4, 6, 0, 3, 7, 1);\n"
+ "\n"
+ " vec2 tex_coord = vec2(textureCoord.x - 1.0 / 4,\n"
+ " textureCoord.y - 1.0 / samples);\n"
+ " tex_coord = vec2(x_scale * tex_coord.x,\n"
+ " y_scale * tex_coord.y);\n"
+ "\n"
+ " if((tex_coord.x) < x_scale * xmin)\n"
+ " tex_coord.x = x_scale * xmin;\n"
+ " if(tex_coord.x >= x_scale * xmax - 1.0)\n"
+ " tex_coord.x = x_scale * xmax - 1.0;\n"
+ "\n"
+ " if(tex_coord.y < y_scale * ymin)\n"
+ " tex_coord.y = y_scale * ymin;\n"
+ " if(tex_coord.y >= y_scale * ymax - 1.0)\n"
+ " tex_coord.y = y_scale * ymax - 1.0;\n"
+ "\n"
+ " x_f = fract(tex_coord.x);\n"
+ " y_f = fract(tex_coord.y);\n"
+ "\n"
+ " tex_coord.x = int(tex_coord.x) / x_scale;\n"
+ " tex_coord.y = int(tex_coord.y) / y_scale;\n"
+ "\n"
+ " s_0_coord = tex_coord;\n"
+ " s_1_coord = s_0_coord + vec2(1 / x_scale, 0 / y_scale);\n"
+ " s_2_coord = s_0_coord + vec2(0 / x_scale, 1 / y_scale);\n"
+ " s_3_coord = s_0_coord + vec2(1 / x_scale, 1 / y_scale);\n"
+ "\n"
+ " if (samples == 4) {\n"
+ " s_0 = texelFetch(ms_tex, ivec2(s_0_coord),\n"
+ " int(2 * fract(s_0_coord.x) +\n"
+ " samples * fract(s_0_coord.y)));\n"
+ " s_1 = texelFetch(ms_tex, ivec2(s_1_coord),\n"
+ " int(2 * fract(s_1_coord.x) +\n"
+ " samples * fract(s_1_coord.y)));\n"
+ " s_2 = texelFetch(ms_tex, ivec2(s_2_coord),\n"
+ " int(2 * fract(s_2_coord.x) +\n"
+ " samples * fract(s_2_coord.y)));\n"
+ " s_3 = texelFetch(ms_tex, ivec2(s_3_coord),\n"
+ " int(2 * fract(s_3_coord.x) +\n"
+ " samples * fract(s_3_coord.y)));\n"
+ " } else {\n"
+ " s_0 = texelFetch(ms_tex, ivec2(s_0_coord),\n"
+ " sample_map[int(2 * fract(s_0_coord.x) +\n"
+ " samples * fract(s_0_coord.y))]);\n"
+ " s_1 = texelFetch(ms_tex, ivec2(s_1_coord),\n"
+ " sample_map[int(2 * fract(s_1_coord.x) +\n"
+ " samples * fract(s_1_coord.y))]);\n"
+ " s_2 = texelFetch(ms_tex, ivec2(s_2_coord),\n"
+ " sample_map[int(2 * fract(s_2_coord.x) +\n"
+ " samples * fract(s_2_coord.y))]);\n"
+ " s_3 = texelFetch(ms_tex, ivec2(s_3_coord),\n"
+ " sample_map[int(2 * fract(s_3_coord.x) +\n"
+ " samples * fract(s_3_coord.y))]);\n"
+ " }\n"
+ "\n"
+ " vec4 color_x1 = mix(s_0, s_1, x_f);\n"
+ " vec4 color_x2 = mix(s_2, s_3, x_f);\n"
+ " out_color = mix(color_x1, color_x2, y_f);\n"
+ "}\n";
+ /* Compile program */
+ prog = glCreateProgram();
+ GLint vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vert);
+ glAttachShader(prog, vs);
+ piglit_check_gl_error(GL_NO_ERROR);
+ GLint fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, frag);
+ glAttachShader(prog, fs);
+ glBindAttribLocation(prog, 0, "pos");
+ glBindAttribLocation(prog, 1, "texCoord");
+ glLinkProgram(prog);
+ if (!piglit_link_check_status(prog)) {
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ /* Set up vertex array object */
+ glGenVertexArrays(1, &vao);
+ glBindVertexArray(vao);
+
+ /* Set up vertex input buffer */
+ glGenBuffers(1, &vertex_buf);
+ glBindBuffer(GL_ARRAY_BUFFER, vertex_buf);
+ glEnableVertexAttribArray(0);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float),
+ (void *) 0);
+ glEnableVertexAttribArray(1);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float),
+ (void *) (2*sizeof(float)));
+
+ /* Set up element input buffer to tesselate a quad into
+ * triangles
+ */
+ unsigned int indices[6] = { 0, 1, 2, 0, 2, 3 };
+ GLuint element_buf;
+ glGenBuffers(1, &element_buf);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, element_buf);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices,
+ GL_STATIC_DRAW);
+}
+
+void
+ms_blit_scaled_glsl(const Fbo *src_fbo, GLint samples)
+{
+ const float proj[4][4] = {
+ { 1, 0, 0, 0 },
+ { 0, 1, 0, 0 },
+ { 0, 0, 1, 0 },
+ { 0, 0, 0, 1 }};
+
+ float vertex_data[4][4] = {
+ { -1, -1, srcX0, srcY0 },
+ { -1, 1, srcX0, srcY1 },
+ { 1, 1, srcX1, srcY1 },
+ { 1, -1, srcX1, srcY0 }};
+
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, src_fbo->color_tex);
+ glUseProgram(prog);
+ glBindVertexArray(vao);
+
+ /* Set up uniforms */
+ glUseProgram(prog);
+ glUniform1i(glGetUniformLocation(prog, "ms_tex"), 0);
+ glUniform1i(glGetUniformLocation(prog, "samples"), samples);
+ glUniform1f(glGetUniformLocation(prog, "xmin"), 0);
+ glUniform1f(glGetUniformLocation(prog, "ymin"), 0);
+ glUniform1f(glGetUniformLocation(prog, "xmax"),
+ multisampled_fbo.config.width);
+ glUniform1f(glGetUniformLocation(prog, "ymax"),
+ multisampled_fbo.config.height);
+ glUniformMatrix4fv(glGetUniformLocation(prog, "proj"), 1,
+ GL_TRUE, &proj[0][0]);
+
+ glBindBuffer(GL_ARRAY_BUFFER, vertex_buf);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), vertex_data,
+ GL_STREAM_DRAW);
+ glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, (void *) 0);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ if (argc != 2)
+ print_usage_and_exit(argv[0]);
+
+ /* 1st arg: num_samples */
+ char *endptr = NULL;
+ num_samples = strtol(argv[1], &endptr, 0);
+ if (endptr != argv[1] + strlen(argv[1]))
+ print_usage_and_exit(argv[0]);
+
+ piglit_require_gl_version(21);
+ piglit_require_extension("GL_ARB_vertex_array_object");
+ piglit_require_extension("GL_EXT_framebuffer_multisample_blit_scaled");
+
+ /* Skip the test if num_samples > GL_MAX_SAMPLES */
+ GLint max_samples;
+ glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
+ if (num_samples == 0 || num_samples > max_samples)
+ piglit_report_result(PIGLIT_SKIP);
+
+ singlesampled_fbo.setup(FboConfig(0,
+ 2 * pattern_width,
+ pattern_height));
+ /* Create two multisample FBOs with same dimensions and sample count
+ * but different color attachment types.
+ */
+ FboConfig msConfig(num_samples, pattern_width, pattern_height);
+ msConfig.attach_texture = true;
+ multisampled_tex.setup(msConfig);
+ msConfig.attach_texture = false;
+ multisampled_fbo.setup(msConfig);
+
+ test_pattern = new Triangles();
+ test_pattern->compile();
+
+ compile_shader();
+ if (!piglit_check_gl_error(GL_NO_ERROR)) {
+ piglit_report_result(PIGLIT_FAIL);
+ }
+}
+
+bool test_ms_blit_scaled(Fbo ms_fbo)
+{
+ GLfloat scale;
+ GLint samples;
+ bool pass = true, result = true;
+
+ /* Draw the test pattern into the framebuffer with texture
+ * attachment.
+ */
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisampled_tex.handle);
+ glViewport(0, 0, srcX1, srcY1);
+ glGetIntegerv(GL_SAMPLES, &samples);
+ glClear(GL_COLOR_BUFFER_BIT);
+ test_pattern->draw(TestPattern::no_projection);
+
+ if(!ms_fbo.config.attach_texture) {
+ /* Blit the framebuffer with multisample texture attachment
+ * into the framebuffer with multisample renderbuffer attachment.
+ */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, multisampled_tex.handle);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisampled_fbo.handle);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glBlitFramebuffer(0, 0,
+ multisampled_tex.config.width,
+ multisampled_tex.config.height,
+ 0, 0,
+ multisampled_tex.config.width,
+ multisampled_tex.config.height,
+ GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ }
+
+ for(scale = 0.1; scale < 2.5f; scale += 0.1) {
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ /* Do scaled resolve of multisampled_fbo to left half of
+ * singlesampled_fbo.
+ */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, ms_fbo.handle);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, singlesampled_fbo.handle);
+ glClearColor(0.0, 1.0, 0.0, 1.0);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glClearColor(0.0, 0.0, 0.0, 0.0);
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(0, 0, pattern_width, pattern_height);
+ glBlitFramebuffer(srcX0, srcY0,
+ srcX1, srcY1,
+ dstX0, dstY0,
+ dstX0 + srcX1 * scale, dstY0 + srcY1 * scale,
+ GL_COLOR_BUFFER_BIT,
+ GL_SCALED_RESOLVE_FASTEST_EXT);
+ glDisable(GL_SCISSOR_TEST);
+
+ /* Use multisampled texture to draw in to right half of scaled
+ * single-sampled buffer using shader program.
+ */
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, multisampled_tex.handle);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, singlesampled_fbo.handle);
+ glViewport(pattern_width + dstX0, dstY0, srcX1 * scale, srcY1 * scale);
+ ms_blit_scaled_glsl(&multisampled_tex, samples);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, singlesampled_fbo.handle);
+ result = piglit_probe_rect_halves_equal_rgba(0, 0,
+ piglit_width,
+ piglit_height);
+ pass = result && pass;
+
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, singlesampled_fbo.handle);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
+ glBlitFramebuffer(0, 0, 2 * pattern_width, piglit_height,
+ 0, 0, 2 * pattern_width, piglit_height,
+ GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ piglit_present_results();
+ printf("MS attachment = %24s, scale = %f, result = %s\n",
+ ms_fbo.config.attach_texture ?
+ "MULTISAMPLE_TEXTURE" :
+ "MULTISAMPLE_RENDERBUFFER",
+ scale, result ? "pass" : "fail");
+ }
+ return pass;
+}
+
+enum piglit_result
+piglit_display()
+{
+ bool pass = true;
+ printf("Left Image: multisample scaled blit using extension.\n"
+ "Right Image: multisample scaled blit using shader program.\n");
+ pass = test_ms_blit_scaled(multisampled_tex)
+ && pass;
+ pass = test_ms_blit_scaled(multisampled_fbo)
+ && pass;
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-17 13:23:55 +0000