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Add PNG connection type and Freetype 2 font rendering to glcd driver. The PNG

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image writer is for debugging only. The Freetype font renderer still misses
some features (e.g. big numbers, character encoding, non-standard cell size).
This commit is contained in:
mmdolze
2011-11-03 22:09:24 +00:00
parent b1e8fa9fb8
commit 2e2bb53af8
13 changed files with 749 additions and 136 deletions
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server/drivers/glcd-low.h
+35 -2
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@@ -14,8 +14,6 @@
#define GLCD_MAX_WIDTH 640
#define GLCD_MAX_HEIGHT 480
#define BYTES_PER_LINE (p->px_width / 8)
/** private data for the \c glcd driver */
typedef struct glcd_private_data {
unsigned char *framebuf; /**< frame buffer */
@@ -27,6 +25,8 @@ typedef struct glcd_private_data {
int height; /**< display height in characters */
struct hwDependentFns *glcd_functions; /**< pointers to low-level functions */
void *ct_data; /**< Connection type specific data */
void *render_config; /**< Settings for the font renderer */
char use_ft2; /**< (Not) use FreeType if available */
} PrivateData;
/** Structure holding pointers to display specific functions */
@@ -51,4 +51,37 @@ typedef struct hwDependentFns {
void (*close)(PrivateData *p);
} GLCD_functions;
/* ================== Framebuffer functions and macros =================== */
#define BYTES_PER_LINE (p->px_width / 8)
#define FB_BYTES_TOTAL (p->px_height * BYTES_PER_LINE)
/**
* Draw one pixel into the framebuffer using 1bpp (black and white). This
* function actually decides about the format of the framebuffer. Using this
* implementation (0,0) is top left and bytes contain pixels from left to right.
*
* \param p Pointer to driver's private data.
* \param x X-position
* \param y Y-position
* \param color Pixel color: 1 = set (black), 0 = not set (blank/white)
*/
static inline void
fb_draw_pixel(PrivateData *p, int x, int y, int color)
{
unsigned int pos; /* Byte within the framebuffer */
unsigned char bit; /* Bit within the framebuffer byte */
if (x < 0 || x >= p->px_width || y < 0 || y >= p->px_height)
return;
pos = y * BYTES_PER_LINE + (x / 8);
bit = 0x80 >> (x % 8);
if (color == 1)
p->framebuf[pos] |= bit;
else
p->framebuf[pos] &= ~bit;
}
#endif