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/*
* 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@anholt.net>
* Brian Paul
*/
/** @file fbo-readdrawpix.c
*
* Test glReadPixels / glDrawPixels between FBO and window.
* See also fbo-blit.c and fbo-copypix.c
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
#define PAD 10
#define SIZE 20
/* size of texture/renderbuffer (power of two) */
#define FBO_SIZE 64
static GLuint
make_fbo(int w, int h)
{
GLuint tex;
GLuint fb;
GLenum status;
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
w, h, 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,
GL_TEXTURE_2D,
tex,
0);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
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);
}
return fb;
}
static void
draw_color_rect(int x, int y, int w, int h)
{
int x1 = x;
int x2 = x + w / 2;
int y1 = y;
int y2 = y + h / 2;
glColor4f(1.0, 0.0, 0.0, 0.0);
piglit_draw_rect(x1, y1, w / 2, h / 2);
glColor4f(0.0, 1.0, 0.0, 0.0);
piglit_draw_rect(x2, y1, w / 2, h / 2);
glColor4f(0.0, 0.0, 1.0, 0.0);
piglit_draw_rect(x1, y2, w / 2, h / 2);
glColor4f(1.0, 1.0, 1.0, 0.0);
piglit_draw_rect(x2, y2, w / 2, h / 2);
}
static GLboolean
verify_color_rect(int start_x, int start_y, int w, int h)
{
float red[] = {1, 0, 0, 0};
float green[] = {0, 1, 0, 0};
float blue[] = {0, 0, 1, 0};
float white[] = {1, 1, 1, 0};
if (!piglit_probe_rect_rgb(start_x, start_y, w / 2, h / 2, red))
return GL_FALSE;
if (!piglit_probe_rect_rgb(start_x + w/2, start_y, w/2, h/2, green))
return GL_FALSE;
if (!piglit_probe_rect_rgb(start_x, start_y + h/2, w/2, h/2, blue))
return GL_FALSE;
if (!piglit_probe_rect_rgb(start_x + w/2, start_y + h/2, w/2, h/2, white))
return GL_FALSE;
return GL_TRUE;
}
static void
copy(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1)
{
GLsizei srcW = srcX1 - srcX0, srcH = srcY1 - srcY0;
GLsizei dstW = dstX1 - dstX0, dstH = dstY1 - dstY0;
void *buf = malloc(srcW * srcH * 4);
glReadPixels(srcX0, srcY0, srcW, srcH,
GL_RGBA, GL_UNSIGNED_BYTE, buf);
glPixelZoom((float) dstW / (float) srcW,
(float) dstH / (float) srcH);
glWindowPos2i(dstX0, dstY0);
glDrawPixels(srcW, srcH, GL_RGBA, GL_UNSIGNED_BYTE, buf);
free(buf);
}
static GLboolean
run_test(void)
{
GLboolean pass = GL_TRUE;
GLuint fbo;
int fbo_width = FBO_SIZE;
int fbo_height = FBO_SIZE;
int x0 = PAD;
int y0 = PAD;
int y1 = PAD * 2 + SIZE;
int y2 = PAD * 3 + SIZE * 2;
glViewport(0, 0, piglit_width, piglit_height);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
/* Draw the color rect in the window system window */
draw_color_rect(x0, y0, SIZE, SIZE);
fbo = make_fbo(fbo_width, fbo_height);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glViewport(0, 0, fbo_width, fbo_height);
piglit_ortho_projection(fbo_width, fbo_height, GL_FALSE);
glClearColor(1.0, 0.0, 1.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Draw the color rect in the FBO */
draw_color_rect(x0, y0, SIZE, SIZE);
/* Now that we have correct samples, blit things around.
* FBO(bottom) -> WIN(middle)
*/
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbo);
copy(x0, y0, x0 + SIZE, y0 + SIZE,
x0, y1, x0 + SIZE, y1 + SIZE);
/* WIN(bottom) -> FBO(middle) */
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, piglit_winsys_fbo);
copy(x0, y0, x0 + SIZE, y0 + SIZE,
x0, y1, x0 + SIZE, y1 + SIZE);
/* FBO(middle) -> WIN(top) back to verify WIN -> FBO */
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbo);
copy(x0, y1, x0 + SIZE, y1 + SIZE,
x0, y2, x0 + SIZE, y2 + SIZE);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
pass = verify_color_rect(PAD, y0, SIZE, SIZE) && pass;
pass = verify_color_rect(PAD, y1, SIZE, SIZE) && pass;
pass = verify_color_rect(PAD, y2, SIZE, SIZE) && pass;
piglit_present_results();
return pass;
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = run_test();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_gl_version(14);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
piglit_require_extension("GL_EXT_framebuffer_object");
piglit_require_extension("GL_EXT_framebuffer_blit");
}
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