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Code Issues Releases Activity

add screenshot from framebuffer function

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This commit is contained in:
jimzrt 2019-10-06 19:26:32 +02:00
parent 6204a01b4f
commit c62341b117
2 changed files with 88 additions and 6 deletions
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93
source/gfx/gfx.c
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@ -18,6 +18,7 @@
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "gfx.h"
static const u8 _gfx_font[] = {
@ -466,12 +467,12 @@ void gfx_hexdump(u32 base, const u8 *buf, u32 len)
gfx_con.fntsz = prevFontSize;
}
static int abs(int x)
{
if (x < 0)
return -x;
return x;
}
// static int abs(int x)
// {
// if (x < 0)
// return -x;
// return x;
// }
void gfx_set_pixel(u32 x, u32 y, u32 color)
{
@ -546,3 +547,83 @@ void gfx_render_bmp_argb(const u32 *buf, u32 size_x, u32 size_y, u32 pos_x, u32
gfx_ctxt.fb[x + y * gfx_ctxt.stride] = buf[(size_y + pos_y - 1 - y ) * size_x + x - pos_x];
}
}
u8 *gfx_bmp_screenshot(u32 *size)
{
// 14 bytes
struct bitmap_file_header
{
unsigned char bitmap_type[2]; // 2 bytes
int file_size; // 4 bytes
short reserved1; // 2 bytes
short reserved2; // 2 bytes
unsigned int offset_bits; // 4 bytes
} bfh;
// bitmap image header (40 bytes)
struct bitmap_image_header
{
unsigned int size_header; // 4 bytes
unsigned int width; // 4 bytes
unsigned int height; // 4 bytes
short int planes; // 2 bytes
short int bit_count; // 2 bytes
unsigned int compression; // 4 bytes
unsigned int image_size; // 4 bytes
unsigned int ppm_x; // 4 bytes
unsigned int ppm_y; // 4 bytes
unsigned int clr_used; // 4 bytes
unsigned int clr_important; // 4 bytes
} bih;
u32 *fb = gfx_ctxt.fb;
u32 width = gfx_ctxt.width;
u32 height = gfx_ctxt.height;
u32 image_size = width * height;
u32 file_size = 40 + 14 + 3 * image_size;
u32 dpi = 237;
u32 ppm = dpi * 39.375;
memcpy(&bfh.bitmap_type, "BM", 2);
bfh.file_size = file_size;
bfh.reserved1 = 0;
bfh.reserved2 = 0;
bfh.offset_bits = 0;
bih.size_header = sizeof(bih);
bih.width = width;
bih.height = height;
bih.planes = 1;
bih.bit_count = 24;
bih.compression = 0;
bih.image_size = file_size;
bih.ppm_x = ppm;
bih.ppm_y = ppm;
bih.clr_used = 0;
bih.clr_important = 0;
u8 *buffer = (u8 *)malloc(file_size);
u32 offset = 0;
memcpy(buffer, &bfh, 14);
offset += 14;
memcpy(buffer + offset, &bih, 40);
offset += 40;
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < width; x++)
{
u32 index = width * y + x;
memcpy(buffer + offset, fb + index, 3);
offset += 3;
}
}
*size = file_size;
return buffer;
}

1
source/gfx/gfx.h
View file

@ -48,6 +48,7 @@ void gfx_set_rect_grey(const u8 *buf, u32 size_x, u32 size_y, u32 pos_x, u32 pos
void gfx_set_rect_rgb(const u8 *buf, u32 size_x, u32 size_y, u32 pos_x, u32 pos_y);
void gfx_set_rect_argb(const u32 *buf, u32 size_x, u32 size_y, u32 pos_x, u32 pos_y);
void gfx_render_bmp_argb(const u32 *buf, u32 size_x, u32 size_y, u32 pos_x, u32 pos_y);
u8 *gfx_bmp_screenshot(u32 *size);
// Global gfx console and context.
gfx_ctxt_t gfx_ctxt;