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/*
* Copyright © 2013 LunarG, Inc.
*
* 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: Jon Ashburn <jon@lunarg.com>
*/
/**
* Tests GL_ARB_texture_view rendering with various layers.
* Creates texture maps with different solid colors for each layer,
* reads the framebuffer to ensure the rendered color is correct.
*/
#include "piglit-util-gl.h"
#include "common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 20;
config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static const char *TestName = "arb_texture_view-rendering-levels";
static int tex_loc_2Darray;
static int prog2Darray;
/**
* Views with varying minimum and number of layers 2D_ARRAY only
*/
static bool
test_render_layers(void)
{
GLuint tex, new_tex;
GLint width = 16, height = 16, layers = 8;
GLint l;
GLint numLayers[] = {7, 1, 2, 2};
int expectedLayer;
GLfloat expected[3];
int p;
bool pass = true;
glUseProgram(prog2Darray);
glUniform1i(tex_loc_2Darray, 0);
glGenTextures(1, &tex);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, tex);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, 0);
glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, width, height, layers);
/* load each array layer with a different color texture */
for (l = 0; l < layers; l++) {
GLubyte *buf = create_solid_image(width, height, 1, 4, l);
if (buf != NULL) {
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, l,
width, height, 1, GL_RGBA,
GL_UNSIGNED_BYTE, buf);
free(buf);
}
}
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
/* create view of texture with restricted layers and draw quad */
/* using a single layer in the view range which varies every loop */
for (l = 0; l < ARRAY_SIZE(numLayers); l++) {
glGenTextures(1, &new_tex);
glTextureView(new_tex, GL_TEXTURE_2D_ARRAY, tex, GL_RGBA8,
0, 1, l, numLayers[l]);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, new_tex);
glClear(GL_COLOR_BUFFER_BIT);
expectedLayer = l + numLayers[l] - 1;
draw_3d_depth(-1.0, -1.0, 2.0, 2.0, expectedLayer);
expected[0] = Colors[expectedLayer][0] / 255.0;
expected[1] = Colors[expectedLayer][1] / 255.0;
expected[2] = Colors[expectedLayer][2] / 255.0;
p = piglit_probe_pixel_rgb(piglit_width/2, piglit_height/2,
expected);
piglit_present_results();
#if 0
printf("for view min layer=%d expectedLayer=%d expected color=%f %f %f\n",
l, expectedLayer, expected[0], expected[1], expected[2]);
sleep(1);
#endif
if (!p) {
printf("%s: wrong color for view min layer %d, expectedLayer %d\n",
TestName, l, expectedLayer);
pass = false;
}
glDeleteTextures(1, &new_tex);
}
glDeleteTextures(1, &tex);
return pass;
}
#define X(f, desc) \
do { \
const bool subtest_pass = (f); \
piglit_report_subtest_result(subtest_pass \
? PIGLIT_PASS : PIGLIT_FAIL, \
(desc)); \
pass = pass && subtest_pass; \
} while (0)
enum piglit_result
piglit_display(void)
{
bool pass = true;
X(test_render_layers(), "2D layers rendering");
#undef X
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
char *vsCode;
char *fsCode;
piglit_require_extension("GL_ARB_texture_storage");
piglit_require_extension("GL_ARB_texture_view");
piglit_require_extension("GL_EXT_texture_array");
/* setup shaders and program object for 2DArray rendering */
(void)!asprintf(&vsCode,
"void main()\n"
"{\n"
" gl_Position = gl_Vertex;\n"
" gl_TexCoord[0] = gl_MultiTexCoord0;\n"
"}\n");
(void)!asprintf(&fsCode,
"#extension GL_EXT_texture_array : enable\n"
"uniform sampler2DArray tex;\n"
"void main()\n"
"{\n"
" vec4 color = texture2DArray(tex, gl_TexCoord[0].xyz);\n"
" gl_FragColor = vec4(color.xyz, 1.0);\n"
"}\n");
prog2Darray = piglit_build_simple_program(vsCode, fsCode);
free(fsCode);
free(vsCode);
tex_loc_2Darray = glGetUniformLocation(prog2Darray, "tex");
}
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