Skip to content

bgr: Allow flipping the display buffer to BGR #19

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
RobLoach wants to merge 1 commit into
base: master
Choose a base branch
from
Open

bgr: Allow flipping the display buffer to BGR #19

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
144 changes: 108 additions & 36 deletions src/fbgraphics.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -727,21 +727,38 @@ void fbg_fill(struct _fbg *fbg, unsigned char r, unsigned char g, unsigned char
void fbg_pixel(struct _fbg *fbg, int x, int y, unsigned char r, unsigned char g, unsigned char b) {
char *pix_pointer = (char *)(fbg->back_buffer + (y * fbg->line_length + x * fbg->components));

*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
if (fbg->bgr == 0) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
}
else {
*pix_pointer++ = b;
*pix_pointer++ = g;
*pix_pointer++ = r;
}
pix_pointer += fbg->comp_offset;
}

void fbg_pixela(struct _fbg *fbg, int x, int y, unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
char *pix_pointer = (char *)(fbg->back_buffer + (y * fbg->line_length + x * fbg->components));

*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);;
pix_pointer += 1;
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);;
pix_pointer += 1;
if (fbg->bgr == 0) {
*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
}
else {
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
}
pix_pointer += fbg->comp_offset;
}

Expand All @@ -761,9 +778,16 @@ void fbg_hline(struct _fbg *fbg, int x, int y, int w, unsigned char r, unsigned
char *pix_pointer = (char *)(fbg->back_buffer + (y * fbg->line_length + x * fbg->components));

for (xx = 0; xx < w; xx += 1) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
if (fbg->bgr == 0) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
}
else {
*pix_pointer++ = b;
*pix_pointer++ = g;
*pix_pointer++ = r;
}
pix_pointer += fbg->comp_offset;
}
}
Expand All @@ -774,9 +798,16 @@ void fbg_vline(struct _fbg *fbg, int x, int y, int h, unsigned char r, unsigned
char *pix_pointer = (char *)(fbg->back_buffer + (y * fbg->line_length + x * fbg->components));

for (yy = 0; yy < h; yy += 1) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
if (fbg->bgr == 0) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
}
else {
*pix_pointer++ = b;
*pix_pointer++ = g;
*pix_pointer++ = r;
}

pix_pointer += fbg->line_length - 3;
}
Expand All @@ -799,9 +830,16 @@ void fbg_line(struct _fbg *fbg, int x1, int y1, int x2, int y2, unsigned char r,

char *pix_pointer = (char *)(fbg->back_buffer + (py * fbg->line_length + px * fbg->components));

*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
if (fbg->bgr == 0) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
}
else {
*pix_pointer++ = b;
*pix_pointer++ = g;
*pix_pointer++ = r;
}
pix_pointer += fbg->comp_offset;

if (dxabs >= dyabs) {
Expand Down Expand Up @@ -856,12 +894,22 @@ void fbg_recta(struct _fbg *fbg, int x, int y, int w, int h, unsigned char r, un

for (yy = 0; yy < h; yy += 1) {
for (xx = 0; xx < w; xx += 1) {
*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
if (fbg->bgr == 0) {
*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
}
else {
*pix_pointer = ((a * b + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * g + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
*pix_pointer = ((a * r + (255 - a) * (*pix_pointer)) >> 8);
pix_pointer += 1;
}
pix_pointer += fbg->comp_offset;
}

Expand All @@ -876,9 +924,16 @@ void fbg_rect(struct _fbg *fbg, int x, int y, int w, int h, unsigned char r, uns

for (yy = 0; yy < h; yy += 1) {
for (xx = 0; xx < w; xx += 1) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
if (fbg->bgr == 0) {
*pix_pointer++ = r;
*pix_pointer++ = g;
*pix_pointer++ = b;
}
else {
*pix_pointer++ = b;
*pix_pointer++ = g;
*pix_pointer++ = r;
}
pix_pointer += fbg->comp_offset;
}

Expand All @@ -895,9 +950,16 @@ void fbg_frect(struct _fbg *fbg, int x, int y, int w, int h) {
char *pix_pointer = fpix_pointer;

for (xx = 0; xx < w; xx += 1) {
*pix_pointer++ = fbg->fill_color.r;
*pix_pointer++ = fbg->fill_color.g;
*pix_pointer++ = fbg->fill_color.b;
if (fbg->bgr == 0) {
*pix_pointer++ = fbg->fill_color.r;
*pix_pointer++ = fbg->fill_color.g;
*pix_pointer++ = fbg->fill_color.b;
}
else {
*pix_pointer++ = fbg->fill_color.b;
*pix_pointer++ = fbg->fill_color.g;
*pix_pointer++ = fbg->fill_color.r;
}
pix_pointer += fbg->comp_offset;
}

Expand Down Expand Up @@ -1044,12 +1106,22 @@ void fbg_background(struct _fbg *fbg, unsigned char r, unsigned char g, unsigned
char *pix_pointer = (char *)(fbg->back_buffer);

for (i = 0; i < fbg->width_n_height; i += 1) {
*pix_pointer = r;
pix_pointer++;
*pix_pointer = g;
pix_pointer++;
*pix_pointer = b;
pix_pointer++;
if (fbg->bgr == 0) {
*pix_pointer = r;
pix_pointer++;
*pix_pointer = g;
pix_pointer++;
*pix_pointer = b;
pix_pointer++;
}
else {
*pix_pointer = b;
pix_pointer++;
*pix_pointer = g;
pix_pointer++;
*pix_pointer = r;
pix_pointer++;
}
pix_pointer += fbg->comp_offset;
}
}
Expand Down