void gr_fill(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
if(gr_is_curr_clr_opaque)
gl->disable(gl, GGL_BLEND);
gl->recti(gl, x, y, x + w, y + h);
if(gr_is_curr_clr_opaque)
gl->enable(gl, GGL_BLEND);
}
void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
GGLContext *gl = gr_context;
GGLint color[4];
color[0] = ((r << 8) | r) + 1;
color[1] = ((g << 8) | g) + 1;
color[2] = ((b << 8) | b) + 1;
color[3] = ((a << 8) | a) + 1;
gl->color4xv(gl, color);
gr_is_curr_clr_opaque = (a == 255);
}
void gr_fill(int x1, int y1, int x2, int y2)
{
x1 += overscan_offset_x;
y1 += overscan_offset_y;
x2 += overscan_offset_x;
y2 += overscan_offset_y;
GGLContext *gl = gr_context;
gl->disable(gl, GGL_TEXTURE_2D);
gl->recti(gl, x1, y1, x2, y2);
}
void gr_flip(void)
{
GGLContext *gl = gr_context;
/* currently active buffer becomes the backbuffer */
gl->colorBuffer(gl, gr_framebuffer + gr_active_fb);
/* swap front and back buffers */
gr_active_fb = (gr_active_fb + 1) & 1;
/* inform the display driver */
set_active_framebuffer(gr_active_fb);
}
int gr_init(void)
{
gglInit(&gr_context);
GGLContext *gl = gr_context;
gr_mem_surface.data = NULL;
gr_init_font();
gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (gr_vt_fd < 0) {
gr_vt_fd = open("/dev/tty", O_RDWR | O_SYNC);
}
if (gr_vt_fd < 0) {
// This is non-fatal; post-Cupcake kernels don't have tty0.
perror("can't open /dev/tty0");
} else {
ioctl(gr_vt_fd, KDGETMODE, &gr_vt_mode);
if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
// However, if we do open tty0, we expect the ioctl to work.
perror("failed KDSETMODE to KD_GRAPHICS on tty0");
gr_exit();
return -1;
}
}
gr_fb_fd = get_framebuffer(gr_framebuffer);
if (gr_fb_fd < 0) {
perror("unable to get framebuffer");
gr_exit();
return -1;
}
get_memory_surface(&gr_mem_surface);
fprintf(stderr, "framebuffer: fd %d (%d x %d)\n",
gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height);
/* start with 0 as front (displayed) and 1 as back (drawing) */
gr_active_fb = 0;
set_active_framebuffer(0);
gl->colorBuffer(gl, &gr_mem_surface);
gl->activeTexture(gl, 0);
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA);
gr_fb_blank(true);
gr_fb_blank(false);
return 0;
}
void gr_line(int x0, int y0, int x1, int y1, int width)
{
GGLContext *gl = gr_context;
if(gr_is_curr_clr_opaque)
gl->disable(gl, GGL_BLEND);
const int coords0[2] = { x0 << 4, y0 << 4 };
const int coords1[2] = { x1 << 4, y1 << 4 };
gl->linex(gl, coords0, coords1, width << 4);
if(gr_is_curr_clr_opaque)
gl->enable(gl, GGL_BLEND);
}
void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
GGLContext *gl = gr_context;
GGLint color[4];
color[0] = ((r << 8) | r) + 1;
color[1] = ((g << 8) | g) + 1;
color[2] = ((b << 8) | b) + 1;
color[3] = ((a << 8) | a) + 1;
#ifdef COLORS_REVERSED
color[0] = ((b << 8) | b) + 1;
color[2] = ((r << 8) | r) + 1;
#endif
gl->color4xv(gl, color);
}
void gr_fill(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
x += overscan_offset_x;
y += overscan_offset_y;
w += overscan_offset_x;
h += overscan_offset_y;
//fprintf(stderr, "gr_fill: x=%d,y=%d,w=%d,h=%d\n", x, y, w, h);
gl->disable(gl, GGL_TEXTURE_2D);
gl->recti(gl, x, y, w, h);
}
int gr_init(void)
{
gglInit(&gr_context);
GGLContext *gl = gr_context;
gr_init_font();
gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (gr_vt_fd < 0) {
// This is non-fatal; post-Cupcake kernels don't have tty0.
} else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
// However, if we do open tty0, we expect the ioctl to work.
perror("failed KDSETMODE to KD_GRAPHICS on tty0");
gr_exit();
return -1;
}
gr_fb_fd = get_framebuffer(gr_framebuffer);
if (gr_fb_fd < 0) {
perror("Unable to get framebuffer.\n");
gr_exit();
return -1;
}
get_memory_surface(&gr_mem_surface);
fprintf(stderr, "framebuffer: fd %d (%d x %d)\n",
gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height);
/* start with 0 as front (displayed) and 1 as back (drawing) */
gr_active_fb = 0;
if (!has_overlay)
set_active_framebuffer(0);
gl->colorBuffer(gl, &gr_mem_surface);
gl->activeTexture(gl, 0);
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA);
#ifdef TW_SCREEN_BLANK_ON_BOOT
printf("TW_SCREEN_BLANK_ON_BOOT := true\n");
gr_fb_blank(true);
gr_fb_blank(false);
#endif
if (!alloc_ion_mem(fi.line_length * vi.yres))
allocate_overlay(gr_fb_fd, gr_framebuffer);
return 0;
}
int gr_text(int x, int y, const char *s, int bold)
{
GGLContext *gl = gr_context;
GRFont *font = gr_font;
unsigned off;
x += overscan_offset_x;
y += overscan_offset_y;
y -= font->ascent;
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++)) {
off -= 32;
if (off < 96) {
gl->texCoord2i(gl, (off * font->cwidth) - x, 0 - y);
gl->recti(gl, x, y, x + font->cwidth, y + font->cheight);
}
x += font->cwidth;
}
return x;
}
int gr_text_l(int x, int y, const char *s)
{
GGLContext *gl = gr_context;
GRFont *font = gr_font_l;
unsigned off;
y -= font->ascent;
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++))
{
off -= 32;
if (off < 96)
{
gl->texCoord2i(gl, 0 - (gr_fb_width() - y), (off * font->cwidth) - x + 1);
gl->recti(gl, gr_fb_width() - y - font->cheight, x, gr_fb_width() - 1 - y, x + font->cwidth);
}
x += font->cwidth;
}
return x;
}
int gr_textEx(int x, int y, const char *s, void* pFont)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;
/* Handle default font */
if (!font) font = gr_font;
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, x + cwidth, y + font->cheight);
x += cwidth;
}
}
return x;
}
int twgr_text(int x, int y, const char *s)
{
GGLContext *gl = gr_context;
GRFont *font = gr_font;
unsigned off;
unsigned cwidth = 0;
y -= font->ascent;
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++)) {
off -= 32;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
gl->texCoord2i(gl, (off * cwidth) - x, 0 - y);
gl->recti(gl, x, y, x + cwidth, y + font->cheight);
}
x += cwidth;
}
return x;
}
int gr_textExW(int x, int y, const char *s, void* pFont, int max_width)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;
/* Handle default font */
if (!font) font = gr_font;
#ifndef TW_DISABLE_TTF
if(font->type == FONT_TYPE_TTF)
return gr_ttf_textExWH(gl, x, y, s, pFont, max_width, -1);
#endif
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
if ((x + (int)cwidth) < max_width) {
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, x + cwidth, y + font->cheight);
x += cwidth;
} else {
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, max_width, y + font->cheight);
x = max_width;
return x;
}
}
}
gl->disable(gl, GGL_TEXTURE_2D);
return x;
}
void gr_update_surface_dimensions()
{
if(gr_rotation%180 == 0)
{
gr_mem_surface.width = vi.xres;
gr_mem_surface.height = vi.yres;
if(gr_rotation == 0)
gr_mem_surface.stride = vi.xres_virtual;
else
gr_mem_surface.stride = vi.xres;
}
else
{
gr_mem_surface.width = vi.yres;
gr_mem_surface.height = vi.xres;
gr_mem_surface.stride = vi.yres;
}
GGLContext *gl = gr_context;
gl->colorBuffer(gl, &gr_mem_surface);
}
int gr_init(void)
{
GGLContext *gl;
int fd;
gglInit(&gr_context);
gl = gr_context;
gr_init_font();
fd = open("/dev/tty0", O_RDWR | O_SYNC);
if(fd < 0) return -1;
if(ioctl(fd, KDSETMODE, (void*) KD_GRAPHICS)) {
close(fd);
return -1;
}
gr_fb_fd = get_framebuffer(gr_framebuffer);
if(gr_fb_fd < 0) {
ioctl(fd, KDSETMODE, (void*) KD_TEXT);
close(fd);
return -1;
}
gr_vt_fd = fd;
/* start with 0 as front (displayed) and 1 as back (drawing) */
gr_active_fb = 0;
set_active_framebuffer(0);
gl->colorBuffer(gl, gr_framebuffer + 1);
gl->activeTexture(gl, 0);
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA);
return 0;
}
int gr_textExW(int x, int y, const char *s, void* pFont, int max_width)
{
GGLContext *gl = gr_context;
GRFont *gfont = (GRFont*) pFont;
unsigned off, width, height, n;
wchar_t ch;
/* Handle default font */
if (!gfont) gfont = gr_font;
y -= gfont->ascent;
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while(*s) {
if(*((unsigned char*)(s)) < 0x20) {
s++;
continue;
}
off = getCharID(s,pFont);
n = utf8_mbtowc(&ch, s, strlen(s));
if(n <= 0)
break;
s += n;
width = gfont->cwidth[off];
height = gfont->cheight[off];
memcpy(&font_ftex, &gfont->texture, sizeof(font_ftex));
font_ftex.width = width;
font_ftex.height = height;
font_ftex.stride = width;
font_ftex.data = gfont->fontdata[off];
gl->bindTexture(gl, &font_ftex);
gl->texCoord2i(gl, 0 - x, 0 - y);
if ((x + (int)width) < max_width) {
gl->recti(gl, x, y, x + width, y + height);
x += width;
}
else {
gl->recti(gl, x, y, max_width, y + height);
x += max_width;
return x;
}
}
return x;
}
void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
if (gr_context == NULL) {
return;
}
GGLContext *gl = gr_context;
GGLSurface *surface = (GGLSurface*)source;
if(surface->format == GGL_PIXEL_FORMAT_RGBX_8888)
gl->disable(gl, GGL_BLEND);
gl->bindTexture(gl, surface);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
gl->texCoord2i(gl, sx - dx, sy - dy);
gl->recti(gl, dx, dy, dx + w, dy + h);
gl->disable(gl, GGL_TEXTURE_2D);
if(surface->format == GGL_PIXEL_FORMAT_RGBX_8888)
gl->enable(gl, GGL_BLEND);
}
void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
if (gr_context == NULL) {
return;
}
GGLContext *gl = gr_context;
gl->bindTexture(gl, (GGLSurface*) source);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
gl->texCoord2i(gl, sx - dx, sy - dy);
gl->recti(gl, dx, dy, dx + w, dy + h);
}
int gr_text(int x, int y, const char *s)
{
GGLContext *gl = gr_context;
GRFont *gfont = gr_font;
unsigned off, width, height, font_bitmap_width, n;
y -= gfont->ascent;
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s)) {
if(*((unsigned char*)(s)) < 0x20) {
s++;
continue;
}
width = gfont->cwidth;
height = gfont->cheight;
off = ch_utf8_to_custom(s);
if(off >= 96)
width *= 2;
memcpy(&font_ftex, &gfont->texture, sizeof(font_ftex));
font_bitmap_width = (font.width % (font.cwidth * font_char_per_bitmap));
if(!font_bitmap_width)
font_bitmap_width = font.cwidth * font_char_per_bitmap;
font_ftex.width = font_bitmap_width;
font_ftex.stride = font_bitmap_width;
font_ftex.data = font_data[(off < 96) ? (off / font_char_per_bitmap) : ((96 + (off - 96) * 2) / font_char_per_bitmap)];
gl->bindTexture(gl, &font_ftex);
if(off >= 96)
gl->texCoord2i(gl, ((96 + (off - 96) * 2) * font.cwidth) % (font_char_per_bitmap * font.cwidth) - x, 0 - y);
else
gl->texCoord2i(gl, (off % font_char_per_bitmap) * width - x, 0 - y);
gl->recti(gl, x, y, x + width, y + height);
x += width;
n = ch_utf8_length(s);
if(n <= 0)
break;
s += n;
}
return x;
}
void gr_texticon(int x, int y, gr_surface icon) {
if (gr_context == NULL || icon == NULL) {
return;
}
GGLContext* gl = gr_context;
gl->bindTexture(gl, (GGLSurface*) icon);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
int w = gr_get_width(icon);
int h = gr_get_height(icon);
gl->texCoord2i(gl, -x, -y);
gl->recti(gl, x, y, x+gr_get_width(icon), y+gr_get_height(icon));
}
int gr_text(int x, int y, const char *s, int bold)
{
GGLContext *gl = gr_context;
GRFont *gfont = NULL;
unsigned off, width, height, n;
wchar_t ch;
/* Handle default font */
if (!gfont) gfont = gr_font;
x += overscan_offset_x;
y += overscan_offset_y;
y -= gfont->ascent;
// fprintf(stderr, "gr_text: x=%d,y=%d,w=%s\n", x, y, s);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while(*s) {
if(*((unsigned char*)(s)) < 0x20) {
s++;
continue;
}
off = getCharID(s,NULL);
n = utf8_mbtowc(&ch, s, strlen(s));
if(n <= 0)
break;
s += n;
width = gfont->cwidth[off];
height = gfont->cheight[off];
memcpy(&font_ftex, &gfont->texture, sizeof(font_ftex));
font_ftex.width = width;
font_ftex.height = height;
font_ftex.stride = width;
font_ftex.data = gfont->fontdata[off];
gl->bindTexture(gl, &font_ftex);
gl->texCoord2i(gl, 0 - x, 0 - y);
gl->recti(gl, x, y, x + width, y + height);
x += width;
}
return x;
}
int gr_textExWH(int x, int y, const char *s, void* pFont, int max_width, int max_height)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;
int rect_x, rect_y;
/* Handle default font */
if (!font) font = gr_font;
gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
if ((x + (int)cwidth) < max_width)
rect_x = x + cwidth;
else
rect_x = max_width;
if (y + font->cheight < (unsigned int)(max_height))
rect_y = y + font->cheight;
else
rect_y = max_height;
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, rect_x, rect_y);
x += cwidth;
if (x > max_width)
return x;
}
}
return x;
}
int gr_save_screenshot(const char *dest)
{
uint32_t y, stride_bytes;
int res = -1;
GGLContext *gl = NULL;
GGLSurface surface;
uint8_t * volatile img_data = NULL;
uint8_t *ptr;
FILE *fp = NULL;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
fp = fopen(dest, "wb");
if(!fp)
goto exit;
img_data = malloc(vi.xres * vi.yres * 3);
surface.version = sizeof(surface);
surface.width = gr_mem_surface.width;
surface.height = gr_mem_surface.height;
surface.stride = gr_mem_surface.width;
surface.data = img_data;
surface.format = GGL_PIXEL_FORMAT_RGB_888;
gglInit(&gl);
gl->colorBuffer(gl, &surface);
gl->activeTexture(gl, 0);
gl->bindTexture(gl, &gr_mem_surface);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
gl->texCoord2i(gl, 0, 0);
gl->recti(gl, 0, 0, gr_mem_surface.width, gr_mem_surface.height);
gglUninit(gl);
gl = NULL;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
goto exit;
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
goto exit;
if (setjmp(png_jmpbuf(png_ptr)))
goto exit;
png_init_io(png_ptr, fp);
png_set_IHDR(png_ptr, info_ptr, surface.width, surface.height,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
ptr = img_data;
stride_bytes = surface.width*3;
for(y = 0; y < surface.height; ++y)
{
png_write_row(png_ptr, ptr);
ptr += stride_bytes;
}
png_write_end(png_ptr, NULL);
res = 0;
exit:
if(info_ptr)
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
if(png_ptr)
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
if(gl)
gglUninit(gl);
if(img_data)
free(img_data);
if(fp)
fclose(fp);
return res;
}
void gr_noclip()
{
GGLContext *gl = gr_context;
gl->scissor(gl, 0, 0, gr_fb_width(), gr_fb_height());
gl->disable(gl, GGL_SCISSOR_TEST);
}
void gr_clip(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
gl->scissor(gl, x, y, w, h);
gl->enable(gl, GGL_SCISSOR_TEST);
}
// Scale image function
int res_scale_surface(gr_surface source, gr_surface* destination, float scale_w, float scale_h) {
GGLContext *gl = NULL;
GGLSurface* sc_mem_surface = NULL;
*destination = NULL;
GGLSurface *surface = (GGLSurface*)source;
int w = gr_get_width(source), h = gr_get_height(source);
int sx = 0, sy = 0, dx = 0, dy = 0;
float dw = (float)w * scale_w;
float dh = (float)h * scale_h;
// Create a new surface that is the appropriate size
sc_mem_surface = init_display_surface((int)dw, (int)dh);
if (!sc_mem_surface) {
printf("gr_scale_surface failed to init_display_surface\n");
return -1;
}
sc_mem_surface->format = surface->format;
// Initialize the context
gglInit(&gl);
gl->colorBuffer(gl, sc_mem_surface);
gl->activeTexture(gl, 0);
// Enable or disable blending based on source surface format
if (surface->format == GGL_PIXEL_FORMAT_RGBX_8888) {
gl->disable(gl, GGL_BLEND);
} else {
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_ONE, GGL_ZERO);
}
// Bind our source surface to the context
gl->bindTexture(gl, surface);
// Deal with the scaling
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MIN_FILTER, GGL_LINEAR);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MAG_FILTER, GGL_LINEAR);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_S, GGL_CLAMP);
gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_T, GGL_CLAMP);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
gl->enable(gl, GGL_TEXTURE_2D);
int32_t grad[8];
memset(grad, 0, sizeof(grad));
// s, dsdx, dsdy, scale, t, dtdx, dtdy, tscale <- this is wrong!
// This api uses block floating-point for S and T texture coordinates.
// All values are given in 16.16, scaled by 'scale'. In other words,
// set scale to 0, for 16.16 values.
// s, dsdx, dsdy, t, dtdx, dtdy, sscale, tscale
float dsdx = (float)w / dw;
float dtdy = (float)h / dh;
grad[0] = ((float)sx - (dsdx * dx)) * 65536;
grad[1] = dsdx * 65536;
grad[3] = ((float)sy - (dtdy * dy)) * 65536;
grad[5] = dtdy * 65536;
// printf("blit: w=%d h=%d dx=%d dy=%d dw=%f dh=%f dsdx=%f dtdy=%f s0=%x dsdx=%x t0=%x dtdy=%x\n",
// w, h, dx, dy, dw, dh, dsdx, dtdy, grad[0], grad[1], grad[3], grad[5]);
gl->texCoordGradScale8xv(gl, 0 /*tmu*/, grad);
// draw / scale the source surface to our target context
gl->recti(gl, dx, dy, dx + dw, dy + dh);
gglUninit(gl);
gl = NULL;
// put the scaled surface in our destination
*destination = (gr_surface*) sc_mem_surface;
// free memory used in the source
res_free_surface(source);
source = NULL;
return 0;
}
void gr_fill(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
gl->disable(gl, GGL_TEXTURE_2D);
gl->recti(gl, x, y, w, h);
}
void gr_fill_l(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
gl->disable(gl, GGL_TEXTURE_2D);
gl->recti(gl, gr_fb_width() - h, x, gr_fb_width() - y, w);
}
