[Mesa-dev] [PATCH] Added a fbo test for multiple drawbuffer, with additive blending enabled The blend is the same for each drawbuffer.
Marek Olšák
maraeo at gmail.com
Mon Apr 4 06:33:17 PDT 2011
Pushed, thanks.
Marek
On Thu, Mar 31, 2011 at 12:08 AM, Julian Adams <joolsa at gmail.com> wrote:
> ---
> tests/all.tests | 1 +
> tests/fbo/CMakeLists.gl.txt | 1 +
> tests/fbo/fbo-drawbuffers-blend-add.c | 251
> +++++++++++++++++++++++++++++++++
> 3 files changed, 253 insertions(+), 0 deletions(-)
> create mode 100644 tests/fbo/fbo-drawbuffers-blend-add.c
>
> diff --git a/tests/all.tests b/tests/all.tests
> index c2c58ae..eb86ae7 100644
> --- a/tests/all.tests
> +++ b/tests/all.tests
> @@ -130,6 +130,7 @@ add_plain_test(fbo, 'fbo-depthtex')
> add_plain_test(fbo, 'fbo-depth-sample-compare')
> add_plain_test(fbo, 'fbo-drawbuffers')
> add_plain_test(fbo, 'fbo-drawbuffers-arbfp')
> +add_plain_test(fbo, 'fbo-drawbuffers-blend-add')
> add_plain_test(fbo, 'fbo-drawbuffers-fragcolor')
> add_plain_test(fbo, 'fbo-drawbuffers-maxtargets')
> add_plain_test(fbo, 'fbo-drawbuffers2-blend')
> diff --git a/tests/fbo/CMakeLists.gl.txt b/tests/fbo/CMakeLists.gl.txt
> index 819d5cf..999c0c4 100644
> --- a/tests/fbo/CMakeLists.gl.txt
> +++ b/tests/fbo/CMakeLists.gl.txt
> @@ -36,6 +36,7 @@ add_executable (fbo-clearmipmap fbo-clearmipmap.c)
> add_executable (fbo-clear-formats fbo-clear-formats.c)
> add_executable (fbo-drawbuffers fbo-drawbuffers.c)
> add_executable (fbo-drawbuffers-arbfp fbo-drawbuffers-arbfp.c)
> +add_executable (fbo-drawbuffers-blend-add fbo-drawbuffers-blend-add.c)
> add_executable (fbo-drawbuffers-fragcolor fbo-drawbuffers-fragcolor.c)
> add_executable (fbo-drawbuffers-maxtargets fbo-drawbuffers-maxtargets.c)
> add_executable (fbo-drawbuffers2-blend fbo-drawbuffers2-blend.c)
> diff --git a/tests/fbo/fbo-drawbuffers-blend-add.c
> b/tests/fbo/fbo-drawbuffers-blend-add.c
> new file mode 100644
> index 0000000..d6fce41
> --- /dev/null
> +++ b/tests/fbo/fbo-drawbuffers-blend-add.c
> @@ -0,0 +1,251 @@
> +/*
> + * Copyright © 2010 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.
> + *
> + * Authors:
> + * Eric Anholt <eric at anholt.net>
> + * Marek Olšák <maraeo at gmail.com>
> + *
> + */
> +
> +/** @file fbo-drawbuffers-blend-add.c
> + *
> + * Tests that additive blending is enabled for all render targets with
> ARB_draw_buffers.
> + */
> +
> +#include <string.h>
> +#include "piglit-util.h"
> +
> +int piglit_width = 256;
> +int piglit_height = 256;
> +int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
> +
> +static GLint max_targets;
> +
> +static char *vs_source =
> + "void main()\n"
> + "{\n"
> + " gl_Position = gl_Vertex;\n"
> + "}\n";
> +
> +static char *fs_source_start =
> + "void main()\n"
> + "{\n";
> +
> +static char *fs_source_output =
> + " gl_FragData[%d].xyzw = vec4(%f, %f, %f, %f);\n";
> +
> +static char *fs_source_end =
> + "}\n";
> +
> +float output_values[] = {
> + 0.0, 0.5, 0.0, 0.0,
> + 0.0, 0.0, 0.5, 0.0,
> + 0.0, 0.5, 0.5, 0.0,
> + 0.5, 0.5, 0.0, 0.0,
> +
> + 0.0, 0.5, 0.0, 0.5,
> + 0.0, 0.0, 0.5, 0.5,
> + 0.0, 0.5, 0.5, 0.5,
> + 0.5, 0.5, 0.0, 0.5,
> +
> + 0.0, 0.25, 0.0, 0.0,
> + 0.0, 0.0, 0.25, 0.0,
> + 0.0, 0.25, 0.25, 0.0,
> + 0.25, 0.25, 0.0, 0.0,
> +
> + 0.0, 0.25, 0.0, 0.25,
> + 0.0, 0.0, 0.25, 0.25,
> + 0.0, 0.25, 0.25, 0.25,
> + 0.25, 0.25, 0.0, 0.25};
> +
> +float clear_value = 0.25;
> +
> +static GLuint
> +attach_texture(int i)
> +{
> + GLuint tex;
> +
> + glGenTextures(1, &tex);
> + glBindTexture(GL_TEXTURE_2D, tex);
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
> + 32, 32, 0,
> + GL_RGBA, GL_UNSIGNED_BYTE, NULL);
> +
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
> +
> + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
> + GL_COLOR_ATTACHMENT0_EXT + i,
> + GL_TEXTURE_2D,
> + tex,
> + 0);
> + assert(glGetError() == 0);
> +
> + return tex;
> +}
> +
> +static void
> +generate_and_display_drawbuffers(int count)
> +{
> + GLuint tex[16], fb, fs, vs, prog;
> + GLenum attachments[16], status;
> + int i;
> +
> + glGenFramebuffersEXT(1, &fb);
> + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
> +
> + for (i = 0; i < count; i++) {
> + tex[i] = attach_texture(i);
> + attachments[i] = GL_COLOR_ATTACHMENT0 + i;
> + }
> +
> + status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
> + if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
> + fprintf(stderr, "fbo incomplete (status = 0x%04x)\n",
> status);
> + piglit_report_result(PIGLIT_SKIP);
> + }
> +
> + glDrawBuffersARB(count, attachments);
> +
> + /* Clear all to 0.25 so we see if the shader rendering happens. */
> + glClearColor(clear_value, clear_value, clear_value, clear_value);
> + glClear(GL_COLOR_BUFFER_BIT);
> +
> + /* Build the shader that spams green to all outputs. */
> + vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
> +
> + char fs_output_line[256];
> + char fs_full_source[1024];
> +
> + strcpy(fs_full_source, fs_source_start);
> +
> + for (i = 0; i < count; i++) {
> + sprintf(fs_output_line, fs_source_output, i,
> output_values[i * 4],
> + output_values[(i * 4) + 1],
> output_values[(i * 4) + 2],
> + output_values[(i * 4) + 3]);
> +
> + strcat(fs_full_source, fs_output_line);
> + }
> +
> + strcat(fs_full_source, fs_source_end);
> +
> + assert(strlen(fs_full_source) + 1 < sizeof(fs_full_source) /
> sizeof(fs_full_source[0]));
> +
> + fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER,
> fs_full_source);
> +
> + prog = piglit_link_simple_program(vs, fs);
> + glUseProgram(prog);
> +
> + glEnable(GL_BLEND);
> + glBlendFunc(GL_ONE, GL_ONE);
> + glBlendEquation(GL_FUNC_ADD);
> +
> + /* Now render to all the color buffers. */
> + piglit_draw_rect(-1, -1, 2, 2);
> +
> + glDisable(GL_BLEND);
> +
> + /* OK, now draw each of these textures to the winsys framebuffer.
> */
> + glUseProgram(0);
> + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
> + piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
> + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
> + glEnable(GL_TEXTURE_2D);
> + for (i = 0; i < count; i++) {
> + glBindTexture(GL_TEXTURE_2D, tex[i]);
> + piglit_draw_rect_tex(16 * i, 16 * (count - 1),
> + 16, 16,
> + 0, 0,
> + 1, 1);
> + }
> + glDisable(GL_TEXTURE_2D);
> +
> + for (i = 0; i < count; i++) {
> + glDeleteTextures(1, &tex[i]);
> + }
> + glDeleteFramebuffersEXT(1, &fb);
> +}
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> + #define N_VECTOR_ITEMS 4
> + GLboolean pass = GL_TRUE;
> + int count, i, j;
> + float expected[N_VECTOR_ITEMS] = {0};
> +
> +
> + glClearColor(0.5, 0.5, 0.5, 0.5);
> + glClear(GL_COLOR_BUFFER_BIT);
> +
> + for (count = 1; count <= max_targets; count++) {
> + generate_and_display_drawbuffers(count);
> + }
> +
> + for (count = 1; count <= max_targets; count++) {
> + for (i = 0; i < count; i++) {
> + for (j = 0; j < N_VECTOR_ITEMS; j++) {
> + expected[j] = output_values[(i *
> N_VECTOR_ITEMS) + j] +
> + clear_value;
> + }
> +
> + pass = pass &&
> + piglit_probe_pixel_rgba(16 * i + 8,
> + 16 * (count - 1)
> + 8,
> + expected);
> + }
> + }
> +
> + glutSwapBuffers();
> +
> + return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
> +}
> +
> +void
> +piglit_init(int argc, char **argv)
> +{
> + GLint max_attachments;
> +
> + printf("The result should be a rows of boxes of differing colors,
> \n"
> + "one for each drawbuffer target used (none black).\n");
> +
> + piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
> +
> + if (!GLEW_VERSION_2_0) {
> + printf("Requires OpenGL 2.0\n");
> + piglit_report_result(PIGLIT_SKIP);
> + }
> +
> + piglit_require_extension("GL_EXT_framebuffer_object");
> + piglit_require_extension("GL_ARB_draw_buffers");
> +
> + glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_targets);
> + if (max_targets < 2)
> + piglit_report_result(PIGLIT_SKIP);
> +
> + glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &max_attachments);
> + if (max_targets > max_attachments)
> + max_targets = max_attachments;
> +
> + if (max_targets > 16)
> + max_targets = 16;
> +}
> --
> 1.7.1
>
>
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