mirror of
https://github.com/outbackdingo/UltraGrid.git
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281 lines
9.9 KiB
C
281 lines
9.9 KiB
C
/**
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* Copyright (c) 2011, Martin Srom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "dxt_common.h"
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#include "dxt_decoder.h"
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#include "dxt_util.h"
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#include "dxt_glsl.h"
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/** Documented at declaration */
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struct dxt_display
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{
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// DXT type
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enum dxt_type type;
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// Width in pixels
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int width;
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// Height in pixels
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int height;
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// Texture id
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GLuint texture_id;
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// Comperessed texture id
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GLuint texture_compressed_id;
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// Current texture id
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GLuint texture_current_id;
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// Program and shader handles
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GLhandleARB program_display;
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GLhandleARB program_display_dxt5ycocg;
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GLhandleARB shader_fragment_display;
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GLhandleARB shader_fragment_display_dxt5ycocg;
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// Show
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int show;
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};
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/**
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* Current DXT decoder
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*/
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struct dxt_display g_display;
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/**
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* OpenGL render
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*
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* @return void
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*/
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void
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dxt_display_render(void)
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{
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glClear(GL_COLOR_BUFFER_BIT);
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glViewport(0, 0, glutGet(GLUT_WINDOW_WIDTH), glutGet(GLUT_WINDOW_HEIGHT));
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glUseProgramObjectARB(g_display.program_display);
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if ( g_display.texture_id != 0 && (g_display.texture_current_id == 0 ||
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g_display.texture_current_id == g_display.texture_id ) ) {
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glBindTexture(GL_TEXTURE_2D, g_display.texture_id);
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if ( g_display.texture_current_id != 0)
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glutSetWindowTitle("Display Image");
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}
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if ( g_display.texture_compressed_id != 0 && (g_display.texture_current_id == 0 ||
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g_display.texture_current_id == g_display.texture_compressed_id ) ) {
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if ( g_display.type == DXT_TYPE_DXT5_YCOCG ) {
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glUseProgramObjectARB(g_display.program_display_dxt5ycocg);
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}
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glBindTexture(GL_TEXTURE_2D, g_display.texture_compressed_id);
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if ( g_display.texture_current_id != 0)
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glutSetWindowTitle("Display Compressed Image");
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}
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glBegin(GL_QUADS);
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glTexCoord2f(0.0, 0.0); glVertex2f(-1.0, -1.0);
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glTexCoord2f(1.0, 0.0); glVertex2f(1.0, -1.0);
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glTexCoord2f(1.0, 1.0); glVertex2f(1.0, 1.0);
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glTexCoord2f(0.0, 1.0); glVertex2f(-1.0, 1.0);
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glEnd();
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glUseProgramObjectARB(0);
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glutSwapBuffers();
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}
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/**
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* OpenGL handle keyboard
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*
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* @return void
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*/
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void
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dxt_display_keyboard(unsigned char key, int x, int y)
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{
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switch ( key ) {
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case 9: // [Tab] Change texture
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if ( g_display.texture_current_id != 0 ) {
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if ( g_display.texture_current_id == g_display.texture_id && g_display.texture_compressed_id != 0 )
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g_display.texture_current_id = g_display.texture_compressed_id;
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else if ( g_display.texture_current_id == g_display.texture_compressed_id && g_display.texture_id != 0 )
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g_display.texture_current_id = g_display.texture_id;
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glutPostRedisplay();
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}
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break;
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case 27: // [ESC] Quit
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g_display.show = 0;
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return;
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}
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}
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/**
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* OpenGL init
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*
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* @return zero if succeeds, otherwise nonzero
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*/
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int
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dxt_display_init(const char* title, enum dxt_type type, int width, int height)
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{
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g_display.type = type;
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g_display.width = width;
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g_display.height = height;
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g_display.texture_id = 0;
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g_display.texture_compressed_id = 0;
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g_display.texture_current_id = 0;
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int argc = 0;
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if ( title != NULL )
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glutSetWindowTitle(title);
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glutReshapeWindow(width, height);
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glutDisplayFunc(dxt_display_render);
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glutKeyboardFunc(dxt_display_keyboard);
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glutShowWindow();
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// Create program [display] and its shader
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g_display.program_display = glCreateProgramObjectARB();
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// Create shader from file
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g_display.shader_fragment_display = dxt_shader_create_from_source(fp_display, GL_FRAGMENT_SHADER_ARB);
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if ( g_display.shader_fragment_display == 0 )
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return -1;
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// Attach shader to program and link the program
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glAttachObjectARB(g_display.program_display, g_display.shader_fragment_display);
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glLinkProgramARB(g_display.program_display);
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// Create program [display_dxt5ycocg] and its shader
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g_display.program_display_dxt5ycocg = glCreateProgramObjectARB();
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// Create shader from file
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g_display.shader_fragment_display_dxt5ycocg = dxt_shader_create_from_source(fp_display_dxt5ycocg, GL_FRAGMENT_SHADER_ARB);
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if ( g_display.shader_fragment_display_dxt5ycocg == 0 )
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return -1;
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// Attach shader to program and link the program
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glAttachObjectARB(g_display.program_display_dxt5ycocg, g_display.shader_fragment_display_dxt5ycocg);
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glLinkProgramARB(g_display.program_display_dxt5ycocg);
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return 0;
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}
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/**
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* OpenGL run loop
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*
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* @return void
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*/
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void
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dxt_display_run()
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{
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g_display.show = 1;
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glutPostRedisplay();
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while( g_display.show ) {
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//glutMainLoopEvent();
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abort();
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}
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glutHideWindow();
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}
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/** Documented at declaration */
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int
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dxt_display_image(const char* title, DXT_IMAGE_TYPE* image, int width, int height)
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{
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#ifdef DEBUG
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printf("Display Image [resolution: %dx%d]\n", width, height);
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#endif
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dxt_display_init(title, DXT_TYPE_DXT1, width, height);
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glGenTextures(1, &g_display.texture_id);
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glBindTexture(GL_TEXTURE_2D, g_display.texture_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexImage2D(GL_TEXTURE_2D, 0, DXT_IMAGE_GL_FORMAT, width, height, 0, GL_RGBA, DXT_IMAGE_GL_TYPE, image);
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dxt_display_run();
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glDeleteShader(g_display.shader_fragment_display);
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glDeleteShader(g_display.shader_fragment_display_dxt5ycocg);
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glDeleteProgram(g_display.program_display);
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glDeleteProgram(g_display.program_display_dxt5ycocg);
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}
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/** Documented at declaration */
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int
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dxt_display_image_compressed(const char* title, unsigned char* image_compressed, int image_compressed_size, enum dxt_type type, int width, int height)
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{
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#ifdef DEBUG
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printf("Display Compressed Image [size: %d bytes, resolution: %dx%d]\n", image_compressed_size, width, height);
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#endif
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dxt_display_init(title, type, width, height);
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glGenTextures(1, &g_display.texture_compressed_id);
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glBindTexture(GL_TEXTURE_2D, g_display.texture_compressed_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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if ( type == DXT_TYPE_DXT5_YCOCG )
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glCompressedTexImage2DARB(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, width, height, 0, image_compressed_size, image_compressed);
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else
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glCompressedTexImage2DARB(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, width, height, 0, image_compressed_size, image_compressed);
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dxt_display_run();
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}
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/** Documented at declaration */
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int
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dxt_display_image_comparison(DXT_IMAGE_TYPE* image, unsigned char* image_compressed, int image_compressed_size, enum dxt_type type, int width, int height)
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{
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#ifdef DEBUG
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printf("Display Image Comparison [size: %d bytes, resolution: %dx%d]\n", image_compressed_size, width, height);
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#endif
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dxt_display_init("Display Comparison", type, width, height);
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glGenTextures(1, &g_display.texture_id);
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glBindTexture(GL_TEXTURE_2D, g_display.texture_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexImage2D(GL_TEXTURE_2D, 0, DXT_IMAGE_GL_FORMAT, width, height, 0, GL_RGBA, DXT_IMAGE_GL_TYPE, image);
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glGenTextures(1, &g_display.texture_compressed_id);
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glBindTexture(GL_TEXTURE_2D, g_display.texture_compressed_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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if ( g_display.type == DXT_TYPE_DXT5_YCOCG )
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glCompressedTexImage2DARB(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, width, height, 0, image_compressed_size, image_compressed);
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else
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glCompressedTexImage2DARB(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, width, height, 0, image_compressed_size, image_compressed);
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g_display.texture_current_id = g_display.texture_id;
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dxt_display_run();
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return 0;
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}
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