[Piglit] [PATCH 2/9] arb_texture_stencil8: add rendering test (v2.1)
Anuj Phogat
anuj.phogat at gmail.com
Thu Apr 9 14:08:59 PDT 2015
On Mon, Apr 6, 2015 at 8:39 PM, Dave Airlie <airlied at gmail.com> wrote:
> This is based on ARB_stencil_texturing draw.c except
> it only tests stencil texturing.
>
> It's also forward ported to core profile.
>
> v2: fix test comment (Chris)
> v2.1: don't require things we don't need. (Ilia)
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
> tests/spec/arb_texture_stencil8/CMakeLists.gl.txt | 1 +
> tests/spec/arb_texture_stencil8/draw.c | 213 ++++++++++++++++++++++
> 2 files changed, 214 insertions(+)
> create mode 100644 tests/spec/arb_texture_stencil8/draw.c
>
> diff --git a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> index bd3fadd..65e6c19 100644
> --- a/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> +++ b/tests/spec/arb_texture_stencil8/CMakeLists.gl.txt
> @@ -10,5 +10,6 @@ link_libraries (
> )
>
> piglit_add_executable (arb_texture_stencil8-stencil-texture stencil-texture.c)
> +piglit_add_executable (arb_texture_stencil8-draw draw.c)
>
> # vim: ft=cmake:
> diff --git a/tests/spec/arb_texture_stencil8/draw.c b/tests/spec/arb_texture_stencil8/draw.c
> new file mode 100644
> index 0000000..82c5bc0
> --- /dev/null
> +++ b/tests/spec/arb_texture_stencil8/draw.c
> @@ -0,0 +1,213 @@
> +/*
> + * Copyright © 2014 Intel Corporation
> + * 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 draw.c
> + *
> + * A basic drawing test for GL_ARB_texture_stencil8 which ensures that
> + * sampling occurs from the right position in the texture.
> + *
> + * It creates two stencil textures. The first has a horizontal
> + * gradient (0 -> 255 for stencil), and the second a
> + * vertical gradient.
> + *
> + * The expected output is two squares, separated by a blue border.
> + * The left half of the window is generated by stencil texturing, and drawn
> + * in red.
> + *
> + * Stencil
> + * (red)
> + *
> + * 0 --> 1
> + * --------
> + * 1
> + * ^
> + * |
> + * 0
> + */
> +
> +#define __STDC_FORMAT_MACROS
> +#include <inttypes.h>
> +#include "piglit-util-gl.h"
> +
> +PIGLIT_GL_TEST_CONFIG_BEGIN
> +
> + config.supports_gl_core_version = 32;
> + config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
> + config.window_width = 256 + 3;
> + config.window_height = 256 * 2 + 3;
> +
> +PIGLIT_GL_TEST_CONFIG_END
> +
> +float stencil_horiz_expected[256 * 256 * 3];
> +float stencil_vert_expected[256 * 256 * 3];
> +
> +GLuint horiz_tex;
> +GLuint vert_tex;
> +
> +/** A program that samples from stencil using usampler2D. */
> +GLint stencil_prog;
> +
> +GLuint vao;
> +
> +/******************************************************************************/
> +
> +enum piglit_result
> +piglit_display(void)
> +{
> + bool pass = true;
> +
> + glClearColor(0.0, 0.0, 1.0, 1.0);
> + glClear(GL_COLOR_BUFFER_BIT);
> +
> + glUseProgram(stencil_prog);
> +
> + /* Upper left corner: Stencil (black to red, left to right). */
> + glViewport(0, 259, 256, 256);
> + glBindTexture(GL_TEXTURE_2D, horiz_tex);
> + piglit_draw_rect(-1, -1, 2, 2);
> + if (!piglit_probe_image_rgb(0, 259, 256, 256, stencil_horiz_expected)) {
> + printf(" FAIL: stencil (horizontal).\n");
> + pass = false;
> + }
> +
> +
> + /* Lower left corner: Stencil (black to red, upwards). */
> + glViewport(0, 0, 256, 256);
> + glBindTexture(GL_TEXTURE_2D, vert_tex);
> + piglit_draw_rect(-1, -1, 2, 2);
> + if (!piglit_probe_image_rgb(0, 0, 256, 256, stencil_vert_expected)) {
> + printf(" FAIL: stencil (vertical).\n");
> + pass = false;
> + }
> +
> + piglit_present_results();
> +
> + return pass ? PIGLIT_PASS : PIGLIT_FAIL;
> +}
> +
> +/******************************************************************************/
> +
> +/*
> + * - Stencil ranges from 0 to 255.
> + *
> + * horiz_tex is left to right (increasing in the +x direction);
> + * vert_tex is bottom to top (increasing in the +y direction).
> + *
> + * Also set up expected values.
> + */
> +static void
> +setup_textures(void)
> +{
> + int i;
> + uint8_t horiz_data[256 * 256];
> + uint8_t vert_data[256 * 256];
> +
> + for (i = 0; i < ARRAY_SIZE(horiz_data); i++) {
> + unsigned x = i % 256;
> + unsigned y = i / 256;
> + horiz_data[i] = x;
> + vert_data[i] = y;
> + }
> +
> + glGenTextures(1, &horiz_tex);
> + glBindTexture(GL_TEXTURE_2D, horiz_tex);
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8,
> + 256, 256, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
> + horiz_data);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + glGenTextures(1, &vert_tex);
> + glBindTexture(GL_TEXTURE_2D, vert_tex);
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
> + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
> + glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8,
> + 256, 256, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
> + vert_data);
> + if (!piglit_check_gl_error(GL_NO_ERROR))
> + piglit_report_result(PIGLIT_FAIL);
> +
> + /* Set up expected values. */
> + memset(stencil_horiz_expected, 0, sizeof(stencil_horiz_expected));
> + memset(stencil_vert_expected, 0, sizeof(stencil_vert_expected));
> +
> + for (i = 0; i < 256 * 256; i++) {
> + unsigned x = i % 256;
> + unsigned y = i / 256;
> + stencil_horiz_expected[3*i] = x / 255.0f;
> + stencil_vert_expected[3*i] = y / 255.0f;
> + }
> +
> +
> +}
> +
> +/**
> + * Compile the shaders used by this program.
> + *
> + */
> +static void
> +setup_shaders(void)
> +{
> + int loc;
> +
> + const char *vs =
> + "#version 130\n"
> + "in vec4 piglit_vertex;\n"
> + "out vec2 texcoords;\n"
> + "void main()\n"
> + "{\n"
> + " gl_Position = piglit_vertex;\n"
> + " texcoords = (piglit_vertex.xy + 1.0) / 2.0;\n"
> + "}\n";
> +
> + const char *fs_stencil =
> + "#version 130\n"
> + "in vec2 texcoords;\n"
> + "uniform usampler2D tex;\n"
> + "void main()\n"
> + "{\n"
> + " uint stencil = texture(tex, texcoords).x;\n"
> + " gl_FragColor = vec4(float(stencil) / 255.0, 0, 0, 1);\n"
> + "}\n";
> +
> + stencil_prog = piglit_build_simple_program(vs, fs_stencil);
> + loc = glGetUniformLocation(stencil_prog, "tex");
> + glUseProgram(stencil_prog);
> + glUniform1i(loc, 0);
> +
> +}
> +
> +void
> +piglit_init(int argc, char **argv)
> +{
> + piglit_require_extension("GL_ARB_texture_stencil8");
> +
> + glGenVertexArrays(1, &vao);
> + glBindVertexArray(vao);
> + setup_textures();
> + setup_shaders();
> +}
> --
> 2.1.0
>
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Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>
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