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/*
* Copyright © 2012 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.
*
* Author: Neil Roberts <neil@linux.intel.com>
*/
/** @file ext_unpack_subimage.c
*
* Test GL_EXT_unpack_subimage.
*/
#include <EGL/egl.h>
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE)
static GLboolean extension_supported;
static GLboolean pass;
static const GLubyte
tex_data[] = {
/* Row 0. This is skipped if the extension is available,
otherwise it makes the top and bottom texel */
0xff, 0x00, 0x00, 0xff, /* red */
0x00, 0xff, 0x00, 0xff, /* green */
/* Row 1. skipped */
0x00, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
/* Row 2. skipped */
0x00, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
/* Row 3. skipped */
0x00, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
/* Row 4. This is the first row used if the extension is
available */
/* The first pixel is skipped */
0x00, 0x00, 0x00, 0xff,
/* This texel becomes the top texel */
0x00, 0x00, 0xff, 0xff, /* blue */
/* Row 5. first texel not used */
0x00, 0x00, 0x00, 0x00,
/* second texel becomes the bottom texel */
0x00, 0xff, 0xff, 0xff /* cyan */
};
static const char
vertex_shader[] =
"attribute vec4 pos_attrib;\n"
"attribute vec2 tex_attrib;\n"
"varying vec2 tex_coord;\n"
"void main () {\n"
"gl_Position = pos_attrib;\n"
"tex_coord = tex_attrib;\n"
"}\n";
static const char
fragment_shader[] =
"uniform sampler2D tex;\n"
"varying vec2 tex_coord;\n"
"void main () {\n"
"gl_FragColor = texture2D(tex, tex_coord);\n"
"}\n";
static void
check_error(void)
{
if (extension_supported) {
if (!piglit_check_gl_error(GL_NO_ERROR))
pass = GL_FALSE;
} else {
if (!piglit_check_gl_error(GL_INVALID_ENUM))
pass = GL_FALSE;
}
}
static GLuint
make_shader(GLenum type,
const char *source)
{
GLuint shader;
GLint length = strlen (source);
GLint status;
shader = glCreateShader(type);
glShaderSource(shader, 1, &source, &length);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (!status)
fprintf(stderr, "Shader compilation failed\n");
return shader;
}
static void
make_program(const char *vertex_source,
const char *fragment_source)
{
GLuint program, shader;
GLuint uniform;
GLint status;
program = glCreateProgram();
shader = make_shader(GL_VERTEX_SHADER, vertex_source);
glAttachShader(program, shader);
shader = make_shader(GL_FRAGMENT_SHADER, fragment_source);
glAttachShader(program, shader);
glBindAttribLocation(program, PIGLIT_ATTRIB_POS, "pos_attrib");
glBindAttribLocation(program, PIGLIT_ATTRIB_TEX, "tex_attrib");
glLinkProgram(program);
glGetShaderiv(program, GL_LINK_STATUS, &status);
if (!status)
fprintf(stderr, "Program linking failed\n");
uniform = glGetUniformLocation(program, "tex");
glUseProgram(program);
glUniform1i(uniform, 0);
}
enum piglit_result
piglit_display(void)
{
GLuint tex;
static const float red[] = { 1, 0, 0, 1 };
static const float green[] = { 0, 1, 0, 1 };
static const float blue[] = { 0, 0, 1, 1 };
static const float cyan[] = { 0, 1, 1, 1 };
pass = GL_TRUE;
extension_supported =
piglit_is_extension_supported("GL_EXT_unpack_subimage");
if (!piglit_automatic) {
if (extension_supported)
printf("GL_EXT_unpack_subimage is supported\n");
else
printf("GL_EXT_unpack_subimage is not supported\n");
}
piglit_reset_gl_error();
if (!piglit_automatic)
printf("Trying GL_UNPACK_ROW_LENGTH\n");
glPixelStorei(GL_UNPACK_ROW_LENGTH, 2);
check_error();
piglit_reset_gl_error();
if (!piglit_automatic)
printf("Trying GL_UNPACK_SKIP_PIXELS\n");
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 1);
check_error();
piglit_reset_gl_error();
if (!piglit_automatic)
printf("Trying GL_UNPACK_SKIP_ROWS\n");
glPixelStorei(GL_UNPACK_SKIP_ROWS, 4);
check_error();
glClear(GL_COLOR_BUFFER_BIT);
/* Try creating a texture with the unpacking parameters we've set */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D,
0, /* level */
GL_RGBA, /* internalFormat */
1, /* width */
2, /* height */
0, /* border */
GL_RGBA, /* format */
GL_UNSIGNED_BYTE, /* type */
tex_data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
make_program(vertex_shader, fragment_shader);
piglit_draw_rect_tex(-1, -1, 2, 2,
0, 0, 1, 1);
if (extension_supported) {
pass &= piglit_probe_pixel_rgba(piglit_width / 2,
piglit_height / 4,
blue);
pass &= piglit_probe_pixel_rgba(piglit_width / 2,
piglit_height * 3 / 4,
cyan);
} else {
pass &= piglit_probe_pixel_rgba(piglit_width / 2,
piglit_height / 4,
red);
pass &= piglit_probe_pixel_rgba(piglit_width / 2,
piglit_height * 3 / 4,
green);
}
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
}
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