diff options
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/video/graphics.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/video/graphics.c b/payloads/libpayload/drivers/video/graphics.c index 2d2ea030ba..2bf5e19d88 100644 --- a/payloads/libpayload/drivers/video/graphics.c +++ b/payloads/libpayload/drivers/video/graphics.c @@ -41,6 +41,8 @@ static struct rect canvas; static struct rect screen; +static uint8_t *gfx_buffer; + /* * Framebuffer is assumed to assign a higher coordinate (larger x, y) to * a higher address @@ -48,7 +50,8 @@ static struct rect screen; static const struct cb_framebuffer *fbinfo; /* Shorthand for up-to-date virtual framebuffer address */ -#define FB ((unsigned char *)phys_to_virt(fbinfo->physical_address)) +#define REAL_FB ((unsigned char *)phys_to_virt(fbinfo->physical_address)) +#define FB (gfx_buffer ? gfx_buffer : REAL_FB) #define LOG(x...) printf("CBGFX: " x) #define PIVOT_H_MASK (PIVOT_H_LEFT|PIVOT_H_CENTER|PIVOT_H_RIGHT) @@ -1257,3 +1260,37 @@ int get_bitmap_dimension(const void *bitmap, size_t sz, struct scale *dim_rel) return CBGFX_SUCCESS; } + +int enable_graphics_buffer(void) +{ + if (gfx_buffer) + return CBGFX_SUCCESS; + + if (cbgfx_init()) + return CBGFX_ERROR_INIT; + + size_t buffer_size = fbinfo->y_resolution * fbinfo->bytes_per_line; + gfx_buffer = malloc(buffer_size); + if (!gfx_buffer) { + LOG("%s: Failed to create graphics buffer (%zu bytes).\n", + __func__, buffer_size); + return CBGFX_ERROR_GRAPHICS_BUFFER; + } + + return CBGFX_SUCCESS; +} + +int flush_graphics_buffer(void) +{ + if (!gfx_buffer) + return CBGFX_ERROR_GRAPHICS_BUFFER; + + memcpy(REAL_FB, gfx_buffer, fbinfo->y_resolution * fbinfo->bytes_per_line); + return CBGFX_SUCCESS; +} + +void disable_graphics_buffer(void) +{ + free(gfx_buffer); + gfx_buffer = NULL; +} |