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warzone2100/lib/ivis_opengl/screen.c

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/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2007 Warzone Resurrection Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Screen.c
*
* Basic double buffered display using direct draw.
*
*/
#ifdef WIN32
/* We need this kludge to avoid a redefinition of INT32 in a jpeglib header */
#define XMD_H
#endif
#include <stdio.h>
#include <string.h>
#include <SDL/SDL.h>
#ifdef _MSC_VER
#include <windows.h> //needed for gl.h! --Qamly
#endif
#include <SDL/SDL_opengl.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <jpeglib.h>
// the following two lines compromise an ugly hack because some jpeglib.h
// actually contain configure-created defines that conflict with ours!
// man, those jpeglib authors should get a frigging clue...
#undef HAVE_STDDEF_H
#undef HAVE_STDLIB_H
#ifdef __cplusplus
}
#endif
#include <physfs.h>
#include <setjmp.h>
#include "lib/framework/frame.h"
#include "lib/framework/frameint.h"
#include "lib/ivis_common/piestate.h"
#include "screen.h"
/* The Current screen size and bit depth */
UDWORD screenWidth = 0;
UDWORD screenHeight = 0;
UDWORD screenDepth = 0;
SDL_Surface *screen;
//backDrop
#define BACKDROP_WIDTH 640
#define BACKDROP_HEIGHT 480
UWORD* pBackDropData = NULL;
BOOL bBackDrop = FALSE;
BOOL bUpload = FALSE;
//fog
SDWORD fogColour = 0;
static char screendump_filename[255];
static unsigned int screendump_num = 0;
static BOOL screendump_required = FALSE;
static UDWORD backDropWidth = BACKDROP_WIDTH;
static UDWORD backDropHeight = BACKDROP_HEIGHT;
static GLuint backDropTexture = ~0;
static void my_error_exit(j_common_ptr cinfo);
/* Initialise the double buffered display */
BOOL screenInitialise(
UDWORD width, // Display width
UDWORD height, // Display height
UDWORD bitDepth, // Display bit depth
BOOL fullScreen // Whether to start windowed
// or full screen
)
{
static int video_flags = 0;
int bpp = 0;
/* Store the screen information */
screenWidth = width;
screenHeight = height;
screenDepth = bitDepth;
// Calculate the common flags for windowed and fullscreen modes.
if (video_flags == 0) {
// Fetch the video info.
const SDL_VideoInfo* video_info = SDL_GetVideoInfo();
if (!video_info) {
return FALSE;
}
// The flags to pass to SDL_SetVideoMode.
video_flags = SDL_OPENGL; // Enable OpenGL in SDL.
video_flags |= SDL_ANYFORMAT; // Don't emulate requested BPP if not available.
video_flags |= SDL_HWPALETTE; // Store the palette in hardware.
// This checks to see if surfaces can be stored in memory.
if (video_info->hw_available) {
video_flags |= SDL_HWSURFACE;
} else {
video_flags |= SDL_SWSURFACE;
}
// This checks if hardware blits can be done.
if (video_info->blit_hw) {
video_flags |= SDL_HWACCEL;
}
if (fullScreen) {
video_flags |= SDL_FULLSCREEN;
}
// Set the double buffer OpenGL attribute.
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
bpp = SDL_VideoModeOK(width, height, bitDepth, video_flags);
if (!bpp) {
debug( LOG_ERROR, "Error: Video mode %dx%d@%dbpp is not supported!\n", width, height, bitDepth );
return FALSE;
}
switch ( bpp )
{
case 32:
case 24:
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 8 );
break;
case 16:
debug( LOG_ERROR, "Warning: Using colour depth of %i instead of %i.", bpp, screenDepth );
debug( LOG_ERROR, " You will experience graphics glitches!" );
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 6 );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 8 );
break;
case 8:
debug( LOG_ERROR, "Error: You don't want to play Warzone with a bit depth of %i, do you?", bpp );
exit( 1 );
break;
default:
debug( LOG_ERROR, "Error: Unsupported bit depth: %i", bpp );
exit( 1 );
break;
}
}
screen = SDL_SetVideoMode(width, height, bpp, video_flags);
if (!screen) {
debug( LOG_ERROR, "Error: SDL_SetVideoMode failed (%s).\n", SDL_GetError() );
return FALSE;
}
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, width, height, 0, 1, -1);
glMatrixMode(GL_TEXTURE);
glScalef(1/256.0, 1/256.0, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glCullFace(GL_FRONT);
glEnable(GL_CULL_FACE);
return TRUE;
}
/* Release the DD objects */
void screenShutDown(void)
{
if (screen != NULL)
{
SDL_FreeSurface(screen);
}
}
/* Return a pointer to the back buffer surface */
void *screenGetSurface(void)
{
return NULL;
}
void screen_SetBackDrop(UWORD *newBackDropBmp, UDWORD width, UDWORD height)
{
bBackDrop = TRUE;
pBackDropData = newBackDropBmp;
backDropWidth = width;
backDropHeight = height;
}
BOOL image_init(pie_image* image)
{
if (image == NULL) return TRUE;
image->width = 0;
image->height = 0;
image->channels = 0;
image->data = NULL;
return FALSE;
}
BOOL image_create(pie_image* image,
unsigned int width,
unsigned int height,
unsigned int channels)
{
if (image == NULL) return TRUE;
image->width = width;
image->height = height;
image->channels = channels;
if (image->data != NULL) {
free(image->data);
}
image->data = (unsigned char*)malloc(width*height*channels);
return FALSE;
}
BOOL image_delete(pie_image* image)
{
if (image == NULL) return TRUE;
if (image->data != NULL) {
free(image->data);
image->data = NULL;
}
return FALSE;
}
typedef struct my_error_mgr {
struct jpeg_error_mgr pub;
jmp_buf setjmp_buffer;
}* my_error_ptr;
static void my_error_exit(j_common_ptr cinfo)
{
my_error_ptr myerr = (my_error_ptr) cinfo->err;
longjmp(myerr->setjmp_buffer, 1);
}
METHODDEF(void) init_source(j_decompress_ptr cinfo) {}
METHODDEF(boolean) fill_input_buffer(j_decompress_ptr cinfo)
{
static JOCTET dummy[] = { (JOCTET) 0xFF, (JOCTET) JPEG_EOI };
/* Insert a fake EOI marker */
cinfo->src->next_input_byte = dummy;
cinfo->src->bytes_in_buffer = 2;
return TRUE;
}
METHODDEF(void) skip_input_data(j_decompress_ptr cinfo, long num_bytes)
{
if (num_bytes > 0) {
while (num_bytes > (long) cinfo->src->bytes_in_buffer) {
num_bytes -= (long) cinfo->src->bytes_in_buffer;
(void) fill_input_buffer(cinfo);
}
cinfo->src->next_input_byte += (size_t) num_bytes;
cinfo->src->bytes_in_buffer -= (size_t) num_bytes;
}
}
METHODDEF(void) term_source(j_decompress_ptr cinfo) {}
BOOL image_load_from_jpg(pie_image* image, const char* filename)
{
struct jpeg_decompress_struct cinfo;
struct my_error_mgr jerr;
int row_stride;
int image_size;
uintptr_t tmp;
JSAMPARRAY ptr[1];
struct jpeg_source_mgr jsrc;
char *buffer;
UDWORD fsize;
if (image == NULL) return TRUE;
if (!loadFile(filename, &buffer, &fsize)) {
debug(LOG_ERROR, "Could not load backdrop file \"%s\"!", filename);
return TRUE;
}
jpeg_create_decompress(&cinfo);
cinfo.src = &jsrc;
jsrc.init_source = init_source;
jsrc.fill_input_buffer = fill_input_buffer;
jsrc.skip_input_data = skip_input_data;
jsrc.resync_to_restart = jpeg_resync_to_restart;
jsrc.term_source = term_source;
jsrc.bytes_in_buffer = fsize;
jsrc.next_input_byte = (JOCTET *)buffer;
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer)) {
jpeg_destroy_decompress(&cinfo);
debug(LOG_ERROR, "Error during jpg decompression of \"%s\"!", filename);
FREE(buffer);
return TRUE;
}
jpeg_read_header(&cinfo, TRUE);
cinfo.out_color_space = JCS_RGB;
cinfo.quantize_colors = FALSE;
cinfo.scale_num = 1;
cinfo.scale_denom = 1;
cinfo.dct_method = JDCT_FASTEST;
cinfo.do_fancy_upsampling = FALSE;
jpeg_calc_output_dimensions(&cinfo);
row_stride = cinfo.output_width * cinfo.output_components;
image_size = row_stride * cinfo.output_height;
image_create(image, cinfo.output_width, cinfo.output_height, cinfo.output_components);
jpeg_start_decompress(&cinfo);
tmp = (uintptr_t)image->data;
while (cinfo.output_scanline < cinfo.output_height) {
ptr[0] = (JSAMPARRAY)tmp;
jpeg_read_scanlines(&cinfo, (JSAMPARRAY)ptr, 1);
tmp += row_stride;
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
FREE(buffer);
return FALSE;
}
//=====================================================================
#if 0
static GLuint image_create_texture(char* filename) {
pie_image image;
GLuint texture;
image_init(&image);
if (!image_load_from_jpg(&image, filename)) {
glGenTextures(1, &texture);
pie_SetTexturePage(-1);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
image.width, image.height,
0, GL_RGB, GL_UNSIGNED_BYTE, image.data);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
image_delete(&image);
return texture;
}
#endif
//=====================================================================
void screen_SetBackDropFromFile(char* filename)
{
// HACK : We should use a resource handler here!
char *extension;
// determine the filetype
extension = strrchr(filename, '.');
if(!extension)
{
debug(LOG_ERROR, "Image without extension: \"%s\"!", filename);
return; // filename without extension... don't bother
}
if( strcmp(extension,".jpg") == 0 || strcmp(extension,".jpeg") == 0 )
{
pie_image image;
image_init(&image);
if (!image_load_from_jpg(&image, filename)) {
if (~backDropTexture == 0)
glGenTextures(1, &backDropTexture);
glBindTexture(GL_TEXTURE_2D, backDropTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
image.width, image.height,
0, GL_RGB, GL_UNSIGNED_BYTE, image.data);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
}
image_delete(&image);
return;
}
else if( strcmp(extension,".png") == 0 )
{
iSprite imagePNG;
char * buffer = NULL;
unsigned int dummy = 0;
if (loadFile( filename, &buffer, &dummy ) && pie_PNGLoadMem( buffer, &imagePNG ) )
{
if (~backDropTexture == 0)
glGenTextures(1, &backDropTexture);
glBindTexture(GL_TEXTURE_2D, backDropTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
imagePNG.width, imagePNG.height,
0, GL_RGBA, GL_UNSIGNED_BYTE, imagePNG.bmp);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
free(imagePNG.bmp);
}
FREE(buffer);
return;
}
else
debug(LOG_ERROR, "Unknown extension \"%s\" for image \"%s\"!", extension, filename);
}
//===================================================================
void screen_StopBackDrop(void)
{
bBackDrop = FALSE; //checking [movie]
}
void screen_RestartBackDrop(void)
{
bBackDrop = TRUE;
}
BOOL screen_GetBackDrop(void)
{
return bBackDrop;
}
//******************************************************************
//slight hack to display maps (or whatever) in background.
//bitmap MUST be 512x512 for now. -Q
void screen_Upload(UWORD* newBackDropBmp)
{
if(newBackDropBmp != NULL)
{
glGenTextures(1, &backDropTexture);
pie_SetTexturePage(-1);
glBindTexture(GL_TEXTURE_2D, backDropTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
512,512,//backDropWidth, backDropHeight,
0, GL_RGB, GL_UNSIGNED_BYTE, newBackDropBmp);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
}
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, backDropTexture);
glColor3f(1, 1, 1);
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(255, 0);
glVertex2f(screenWidth, 0);
glTexCoord2f(0, 255);
glVertex2f(0, screenHeight);
glTexCoord2f(255, 255);
glVertex2f(screenWidth, screenHeight);
glEnd();
}
/* Swap between windowed and full screen mode */
void screenToggleMode(void)
{
(void) SDL_WM_ToggleFullScreen(screen);
}
#define BUFFER_SIZE 4096
typedef struct {
struct jpeg_destination_mgr pub;
PHYSFS_file* file;
JOCTET * buffer;
} my_jpeg_destination_mgr;
METHODDEF(void) init_destination(j_compress_ptr cinfo)
{
my_jpeg_destination_mgr* dm = (my_jpeg_destination_mgr*)(cinfo->dest);
/* Allocate the output buffer --- it will be released when done with image */
dm->buffer = (JOCTET *)malloc(BUFFER_SIZE*sizeof(JOCTET));
dm->pub.next_output_byte = dm->buffer;
dm->pub.free_in_buffer = BUFFER_SIZE;
}
METHODDEF(boolean) empty_output_buffer(j_compress_ptr cinfo)
{
my_jpeg_destination_mgr* dm = (my_jpeg_destination_mgr*)cinfo->dest;
PHYSFS_write(dm->file, dm->buffer, BUFFER_SIZE, 1);
dm->pub.next_output_byte = dm->buffer;
dm->pub.free_in_buffer = BUFFER_SIZE;
return TRUE;
}
METHODDEF(void) term_destination(j_compress_ptr cinfo) {
my_jpeg_destination_mgr* dm = (my_jpeg_destination_mgr*)cinfo->dest;
PHYSFS_write(dm->file, dm->buffer, BUFFER_SIZE-dm->pub.free_in_buffer, 1);
free(dm->buffer);
}
void screenDoDumpToDiskIfRequired(void)
{
static unsigned char* buffer = NULL;
static unsigned int buffer_size = 0;
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
my_jpeg_destination_mgr jdest;
JSAMPROW row_pointer[1];
int row_stride;
if (!screendump_required) return;
row_stride = screen->w * 3;
if (row_stride * screen->h > buffer_size) {
if (buffer != NULL) {
free(buffer);
}
buffer_size = row_stride * screen->h;
buffer = (unsigned char*)malloc(buffer_size);
}
glReadPixels(0, 0, screen->w, screen->h, GL_RGB, GL_UNSIGNED_BYTE, buffer);
screendump_required = FALSE;
if ((jdest.file = PHYSFS_openWrite(screendump_filename)) == NULL) {
return;
}
debug( LOG_3D, "Saving screenshot %s\n", screendump_filename );
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
cinfo.dest = &jdest.pub;
jdest.pub.init_destination = init_destination;
jdest.pub.empty_output_buffer = empty_output_buffer;
jdest.pub.term_destination = term_destination;
cinfo.image_width = screen->w;
cinfo.image_height = screen->h;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, 75, TRUE);
jpeg_start_compress(&cinfo, TRUE);
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = & buffer[(screen->h-cinfo.next_scanline-1) * row_stride];
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
PHYSFS_close(jdest.file);
jpeg_destroy_compress(&cinfo);
}
char* screenDumpToDisk(char* path) {
while (1) {
sprintf(screendump_filename, "%s%swz2100_shot_%03i.jpg", path, "/", ++screendump_num);
if (!PHYSFS_exists(screendump_filename)) {
break;
}
}
screendump_required = TRUE;
return screendump_filename;
}
/* Output text to the display screen at location x,y.
* The remaining arguments are as printf.
* Used only in now disabled code. Keep for now, though. - Per
*
void screenTextOut(UDWORD x, UDWORD y, const char *pFormat, ...)
{
}
*/
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