/*
 * Copyright © 2011 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.
 */

#include "piglit-util-gl.h"

/**
 * @file generatemipmap.c
 *
 * Tests that conditional rendering does not affect glGenerateMipmap().
 *
 * It's something that would be likely to be implemented through
 * normal rendering inside of the driver, and thus easy to
 * accidentally disable during conditional rendering.
 */

PIGLIT_GL_TEST_CONFIG_BEGIN

	config.supports_gl_compat_version = 10;
	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
	config.khr_no_error_support = PIGLIT_NO_ERRORS;
	/* Note that this must be half of the texture size,
	 * see comments in the test
	 */
	config.window_width = 32;
	config.window_height = 32;

PIGLIT_GL_TEST_CONFIG_END

static void
fill_level(int level, int size, const GLfloat *color)
{
	GLfloat *data;
	int i;

	data = malloc(size * size * 4 * sizeof(GLfloat));
	for (i = 0; i < 4 * size * size; i += 4) {
		data[i + 0] = color[0];
		data[i + 1] = color[1];
		data[i + 2] = color[2];
		data[i + 3] = color[3];
	}
        glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, size, size, 0,
		     GL_RGBA, GL_FLOAT, data);
	free(data);
}

enum piglit_result
piglit_display(void)
{
	bool pass = true;
	float red[4] = {1.0, 0.0, 0.0, 0.0};
	float green[4] = {0.0, 1.0, 0.0, 0.0};
	GLuint q, texture;
	int tex_size = 64;
	int i;

	glClearColor(0.5, 0.5, 0.5, 0.5);
	glClear(GL_COLOR_BUFFER_BIT);

	/* Set up a texture object with green at level 0, red elsewhere */
	glGenTextures(1, &texture);
	glBindTexture(GL_TEXTURE_2D, texture);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
			GL_LINEAR_MIPMAP_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);

	for (i = 0; tex_size / (1 << i) > 0; i++)
		fill_level(i, tex_size / (1 << i), i == 0 ? green : red);

	glGenQueries(1, &q);

	/* Generate query fail. */
	glBeginQuery(GL_SAMPLES_PASSED, q);
	glEndQuery(GL_SAMPLES_PASSED);

	/* Mipmap generation should not be affected by conditional rendering. */
	glBeginConditionalRenderNV(q, GL_QUERY_WAIT_NV);
	glGenerateMipmapEXT(GL_TEXTURE_2D);
	glEndConditionalRenderNV();

	/* This should draw level 1, since starting window size is 32
	 * and texture is 64.
	 */
	glEnable(GL_TEXTURE_2D);
	piglit_draw_rect_tex(-1, -1, 2, 2,
			     0, 0, 1, 1);
	glDisable(GL_TEXTURE_2D);

	pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
				      green);

	piglit_present_results();

	glDeleteQueries(1, &q);

	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}

void
piglit_init(int argc, char **argv)
{
	piglit_require_gl_version(20);

	piglit_require_extension("GL_NV_conditional_render");
	piglit_require_extension("GL_EXT_framebuffer_object");
}