[Piglit] [PATCH 4/9] arb_texture_stencil8: add fbo using stencil8 texture test
Anuj Phogat
anuj.phogat at gmail.com
Thu Apr 9 14:34:42 PDT 2015
On Mon, Apr 6, 2015 at 8:39 PM, Dave Airlie <airlied at gmail.com> wrote:
> From: Dave Airlie <airlied at redhat.com>
>
> This tests clear, blit and readpixels from an fbo backed by
> a STENCIL_INDEX based texture.
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
> tests/spec/arb_texture_stencil8/CMakeLists.gl.txt | 1 +
> tests/spec/arb_texture_stencil8/fbo-stencil8.c | 347 ++++++++++++++++++++++
> 2 files changed, 348 insertions(+)
> create mode 100644 tests/spec/arb_texture_stencil8/fbo-stencil8.c
>
> diff --git a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> index 4d16073..a8d1693 100644
> --- a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> +++ b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> @@ -11,6 +11,7 @@ link_libraries (
>
> piglit_add_executable (arb_texture_stencil8-stencil-texture stencil-texture.c)
> piglit_add_executable (arb_texture_stencil8-draw draw.c)
> +piglit_add_executable (arb_texture_stencil8-fbo-stencil8 fbo-stencil8.c)
> piglit_add_executable (arb_texture_stencil8-getteximage getteximage.c)
>
> # vim: ft=cmake:
> diff --git a/tests/spec/arb_texture_stencil8/fbo-stencil8.c b/tests/spec/arb_texture_stencil8/fbo-stencil8.c
> new file mode 100644
> index 0000000..61dd644
> --- /dev/null
> +++ b/tests/spec/arb_texture_stencil8/fbo-stencil8.c
> @@ -0,0 +1,347 @@
> +/*
> + * Copyright © 2011 Marek Olšák <maraeo at gmail.com>
> + * Copyright © 2015 Red Hat
> + *
> + * 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 fbo-stencil8.c
> + *
> + * Tests glClear, glReadPixels, glBlitFramebuffer
> + * with stencil buffers generated from stencil textures.
> + */
> +
> +#include "piglit-util-gl.h"
> +
> +#define BUF_SIZE 123
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> + config.supports_gl_core_version = 32;
> +
> + config.window_visual = PIGLIT_GL_VISUAL_DOUBLE;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +enum {
> + CLEAR,
> + READPIXELS,
> + BLIT
> +};
> +int test = CLEAR;
> +
> +#define F(name) #name, name
> +
> +struct format {
> + const char *name;
> + GLuint iformat;
> + const char *extension;
> +} formats[] = {
> + {F(GL_STENCIL_INDEX1), NULL},
> + {F(GL_STENCIL_INDEX4), NULL},
> + {F(GL_STENCIL_INDEX8), NULL},
> + {F(GL_STENCIL_INDEX16), NULL},
> +};
> +
> +struct format f;
> +GLuint mask;
> +GLuint vao;
> +
> +static const char vs_text[] =
> + "#version 130 \n"
> + "in vec4 piglit_vertex;\n"
> + "in vec4 piglit_texcoord;\n"
> + "out vec4 colfs;\n"
> + "void main()\n"
> + "{\n"
> + " gl_Position = piglit_vertex;\n"
> + " colfs = piglit_texcoord;\n"
> + "}\n";
> +
> +static const char fs_text[] =
> + "#version 130 \n"
> + "in vec4 colfs;\n"
> + "void main()\n"
> + "{\n"
> + " gl_FragColor = colfs;\n"
> + "}\n";
> +
> +static GLuint prog;
> +
> +static enum piglit_result test_clear(void)
> +{
> + GLuint cb_tex;
> + GLenum status;
> + float green[3] = {0, 1, 0};
> + enum piglit_result res;
> +
> + glGenTextures(1, &cb_tex);
> + glBindTexture(GL_TEXTURE_2D, cb_tex);
> +
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, BUF_SIZE, BUF_SIZE, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
> +
> + /* Add a colorbuffer. */
> + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, cb_tex, 0);
> +
> + glDrawBuffer(GL_COLOR_ATTACHMENT0);
> + glReadBuffer(GL_COLOR_ATTACHMENT0);
> + status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
> + if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
> + printf("FBO incomplete status 0x%X\n", status);
> + piglit_report_result(PIGLIT_FAIL); /* RGBA8 must succeed. */
> + }
> +
> + glClearStencil(0x3456);
> + glClear(GL_STENCIL_BUFFER_BIT);
> +
> + glEnable(GL_STENCIL_TEST);
> + glStencilFunc(GL_EQUAL, 0x3456 & mask, ~0);
> +
> + glVertexAttrib3fv(1, green);
> + piglit_draw_rect(-1, -1, 2, 2);
> + glVertexAttrib3f(1, 1, 1, 1);
Use glGetAttribLocation() here in place of hard coded location of '1'.
or use glBindAttribLocation() in piglit_init().
> +
> + glDisable(GL_STENCIL_TEST);
> +
> + res = piglit_probe_rect_rgb(0, 0, BUF_SIZE, BUF_SIZE, green) ? PIGLIT_PASS : PIGLIT_FAIL;
> +
> + /* Display the colorbuffer. */
> + if (!piglit_automatic) {
> + glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
> + glBlitFramebufferEXT(0, 0, BUF_SIZE, BUF_SIZE, 0, 0, BUF_SIZE, BUF_SIZE,
> + GL_COLOR_BUFFER_BIT, GL_NEAREST);
> + }
> +
> + glDeleteTextures(1, &cb_tex);
> +
> + return res;
> +}
> +
> +static enum piglit_result compare_stencil(void)
> +{
> + int x, y, failures = 0;
> + GLushort stencil[BUF_SIZE*BUF_SIZE];
> + GLushort expected;
> +
> + /* Read stencil. */
> + glPixelStorei(GL_PACK_ALIGNMENT, 1);
> + glReadPixels(0, 0, BUF_SIZE, BUF_SIZE, GL_STENCIL_INDEX,
> + GL_UNSIGNED_SHORT, stencil);
> +
> + /* Compare results. */
> + for (y = 0; y < BUF_SIZE; y++) {
> + for (x = 0; x < BUF_SIZE; x++) {
> +
> + /* Skip the middle row and column of pixels because
> + * drawing polygons for the left/right and bottom/top
> + * quadrants may hit the middle pixels differently
> + * depending on minor transformation and rasterization
> + * differences.
> + */
> + if (x == BUF_SIZE / 2 || y == BUF_SIZE / 2)
> + continue;
> +
> + if (y < BUF_SIZE/2)
> + expected = (x < BUF_SIZE/2 ? 0x3333 : 0x6666) & mask;
> + else
> + expected = (x < BUF_SIZE/2 ? 0x9999 : 0xbbbb) & mask;
> +
> + if (stencil[y*BUF_SIZE+x] != expected) {
> + failures++;
> + if (failures < 20) {
> + printf("Stencil at %i,%i Expected: 0x%02x Observed: 0x%02x\n",
> + x, y, expected, stencil[y*BUF_SIZE+x]);
> + } else if (failures == 20) {
> + printf("...\n");
> + }
> + }
> + }
> + }
> + if (failures)
> + printf("Total failures: %i\n", failures);
> +
> + return failures == 0 ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> +
> +static enum piglit_result test_readpixels(void)
> +{
> + /* Clear stencil to 0xfe. */
> + glClearStencil(0xfefe);
> + glClear(GL_STENCIL_BUFFER_BIT);
> +
> + /* Initialize stencil. */
> + glEnable(GL_STENCIL_TEST);
> + glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
> +
> + glStencilFunc(GL_ALWAYS, 0x3333 & mask, ~0);
> + piglit_draw_rect(-1, -1, 1, 1);
> +
> + glStencilFunc(GL_ALWAYS, 0x6666 & mask, ~0);
> + piglit_draw_rect(0, -1, 1, 1);
> +
> + glStencilFunc(GL_ALWAYS, 0x9999 & mask, ~0);
> + piglit_draw_rect(-1, 0, 1, 1);
> +
> + glStencilFunc(GL_ALWAYS, 0xbbbb & mask, ~0);
> + piglit_draw_rect(0, 0, 1, 1);
> +
> + glDisable(GL_STENCIL_TEST);
> +
> + return compare_stencil();
> +}
> +
> +static enum piglit_result test_copy(void)
> +{
> + /* Clear stencil to 0xfe. */
> + glClearStencil(0xfefe);
> + glClear(GL_STENCIL_BUFFER_BIT);
> +
> + /* Initialize stencil. */
> + glEnable(GL_STENCIL_TEST);
> + glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
> +
> + /* Set the upper-right corner to 0x3333 and copy the content to the lower-left one. */
> + glStencilFunc(GL_ALWAYS, 0x3333 & mask, ~0);
> + piglit_draw_rect(0, 0, 1, 1);
> + if (test == BLIT)
This check is not required.
> + glBlitFramebufferEXT(BUF_SIZE/2+1, BUF_SIZE/2+1, BUF_SIZE, BUF_SIZE,
> + 0, 0, BUF_SIZE/2, BUF_SIZE/2,
> + GL_STENCIL_BUFFER_BIT, GL_NEAREST);
> +
> + /* Initialize the other corners. */
> + glStencilFunc(GL_ALWAYS, 0x6666 & mask, ~0);
> + piglit_draw_rect(0, -1, 1, 1);
> +
> + glStencilFunc(GL_ALWAYS, 0x9999 & mask, ~0);
> + piglit_draw_rect(-1, 0, 1, 1);
> +
> + glStencilFunc(GL_ALWAYS, 0xbbbb & mask, ~0);
> + piglit_draw_rect(0, 0, 1, 1);
> +
> + glDisable(GL_STENCIL_TEST);
> +
> + return compare_stencil();
> +}
> +
> +enum piglit_result piglit_display(void)
> +{
> + enum piglit_result res;
> + GLuint fb, tex;
> + GLint stencil_size =8;
> + GLenum status;
> +
> + glClearColor(0, 0, 0, 0);
> + glClear(GL_COLOR_BUFFER_BIT);
> +
> + /* Create the FBO. */
> + glGenTextures(1, &tex);
> +
> + glBindTexture(GL_TEXTURE_2D, tex);
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8, BUF_SIZE, BUF_SIZE,
> + 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, NULL);
> + glGenFramebuffersEXT(1, &fb);
> + glBindFramebuffer(GL_FRAMEBUFFER, fb);
> + glFramebufferTexture(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT, tex, 0);
> + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, tex, 0);
> + glViewport(0, 0, BUF_SIZE, BUF_SIZE);
> + glDrawBuffer(GL_NONE);
> + glReadBuffer(GL_NONE);
> + status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
> + if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
> + printf("FBO incomplete status 0x%X\n", status);
> + piglit_report_result(PIGLIT_SKIP);
> + }
> +
> + mask = (1 << stencil_size) - 1;
> +
> + switch (test) {
> + case CLEAR:
> + puts("Testing glClear(stencil8).");
> + res = test_clear();
> + break;
> + case READPIXELS:
> + puts("Testing glReadPixels(stencil8).");
> + res = test_readpixels();
> + break;
> + case BLIT:
> + puts("Testing glBlitFramebuffer(stencil8).");
> + res = test_copy();
> + break;
> + default:
> + assert(0);
> + res = PIGLIT_SKIP;
> + }
> +
> + /* Cleanup. */
> + glBindFramebuffer(GL_FRAMEBUFFER, piglit_winsys_fbo);
> + glDeleteFramebuffersEXT(1, &fb);
> + glDeleteTextures(1, &tex);
> +
> + piglit_present_results();
> +
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> + return res;
> +}
> +
> +void piglit_init(int argc, char **argv)
> +{
> + unsigned i, p;
> + GLuint fs, vs;
> + piglit_require_extension("GL_ARB_texture_stencil8");
> +
> + for (p = 1; p < argc; p++) {
> + if (!strcmp(argv[p], "clear")) {
> + test = CLEAR;
> + continue;
> + }
> + if (!strcmp(argv[p], "readpixels")) {
> + test = READPIXELS;
> + continue;
> + }
> + if (!strcmp(argv[p], "blit")) {
> + test = BLIT;
> + continue;
> + }
> + for (i = 0; i < sizeof(formats)/sizeof(*formats); i++) {
> + if (!strcmp(argv[p], formats[i].name)) {
> + if (formats[i].extension)
> + piglit_require_extension(formats[i].extension);
> + f = formats[i];
> + printf("Testing %s.\n", f.name);
> + break;
> + }
> + }
> + }
> +
> + if (!f.name) {
> + printf("Not enough parameters.\n");
> + piglit_report_result(PIGLIT_SKIP);
> + }
> +
> + fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
> + vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
> + prog = piglit_link_simple_program(vs, fs);
> +
> + glUseProgram(prog);
> + glGenVertexArrays(1, &vao);
> + glBindVertexArray(vao);
> +}
> --
> 2.1.0
>
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With above comments fixed, patch is:
Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>
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