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Added logic to derive the color palette if the framebuffer update is too big

This commit is contained in:
Tony Kuker 2022-01-21 03:10:25 +00:00
parent 9bcc3d09a7
commit 8bae98de20
1 changed files with 70 additions and 56 deletions
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126
src/raspberrypi/devices/scsi_powerview.cpp
View File

@ -667,77 +667,92 @@ bool SCSIPowerView::WriteFrameBuffer(const DWORD *cdb, const BYTE *buf, const DW
return true;
}
if(update_width_px + offset_col_px > 800){
// We can get into this condition when the color depth has not been set by the host. We can try
// to derive it based upon the screen width
if(color_depth == eColorsBW){
if((update_width_px == (800 * 8)) || (update_width_px == (640 * 8)) || (update_width_px == (600 * 8))){
color_depth = eColors256;
// We don't know if we're 256 grays or 256 colors. So, this could be goofy looking
// We're down in an error condition anyway.
LOGINFO("Based upon size of screen update, switching to 256 colors. This may be incorrect if the screen is supposed to be 256 grays");
memcpy(color_palette, default_color_palette_256, sizeof(default_color_palette_256));
// Try it again.... (Re-call this function)
return WriteFrameBuffer(cdb, buf, length);
}
if((update_width_px == (800 * 2)) || (update_width_px == (640 * 2)) || (update_width_px == (600 * 2))){
color_depth = eColors16;
LOGINFO("Based upon size of screen update, switching to 16 colors. This may be incorrect if the screen is supposed to be 16 grays");
memcpy(color_palette, default_color_palette_16, sizeof(default_color_palette_16));
// Try it again.... (Re-call this function)
return WriteFrameBuffer(cdb, buf, length);
}
}
LOGWARN("%s width: (%d + %d) = %d is larger than the limit", __PRETTY_FUNCTION__, update_width_px, offset_col_px, update_width_px + offset_col_px);
return true;
}
// offset_row_px = (uint32_t)((offset) / screen_width_px)/2;
// offset_col_px = (uint32_t)(((offset)/2) % screen_width_px);
LOGDEBUG("Update Position: %d:%d Offset: %d Screen Width: %d Width px: %d:%d (bytes: %d, %d)", offset_col_px, offset_row_px, offset, screen_width_px, update_width_px, update_height_px, update_width_x_bytes, update_height_y_bytes);
DWORD random_print = rand() % (update_height_px * update_width_px);
DWORD random_print = rand() % (update_height_px * update_width_px);
// For each row
for (DWORD idx_row_y = 0; idx_row_y < (update_height_px); idx_row_y++){
// For each column
for (DWORD idx_col_x = 0; idx_col_x < (update_width_px); idx_col_x++){
BYTE pixel_color_idx=0;
DWORD pixel_buffer_idx = 0;
BYTE pixel_buffer_byte = 0;
DWORD pixel_bit_number = 0;
uint32_t loc = 0;
// For each row
for (DWORD idx_row_y = 0; idx_row_y < (update_height_px); idx_row_y++){
switch(color_depth){
case eColorDepth_t::eColorsBW:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x / 8);
pixel_buffer_byte = reverse_table[buf[pixel_buffer_idx]];
pixel_bit_number = idx_col_x % 8;
pixel_color_idx = ((pixel_buffer_byte >> pixel_bit_number) & 0x1) ? 0 : 1;
break;
case eColorDepth_t::eColors16:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x/2);
if(idx_col_x % 2){
pixel_color_idx = buf[pixel_buffer_idx] & 0x0F;
}
else{
pixel_color_idx = buf[pixel_buffer_idx] >> 4;
}
break;
case eColorDepth_t::eColors256:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x);
pixel_color_idx = buf[pixel_buffer_idx];
break;
default:
break;
}
// For each column
for (DWORD idx_col_x = 0; idx_col_x < (update_width_px); idx_col_x++){
BYTE pixel_color_idx=0;
DWORD pixel_buffer_idx = 0;
BYTE pixel_buffer_byte = 0;
DWORD pixel_bit_number = 0;
uint32_t loc = 0;
switch(color_depth){
case eColorDepth_t::eColorsBW:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x / 8);
pixel_buffer_byte = reverse_table[buf[pixel_buffer_idx]];
pixel_bit_number = idx_col_x % 8;
pixel_color_idx = ((pixel_buffer_byte >> pixel_bit_number) & 0x1) ? 0 : 1;
break;
if(pixel_color_idx > (sizeof(color_palette) / sizeof (color_palette[0]))){
LOGWARN("Calculated pixel color that is out of bounds: %04X", pixel_buffer_idx);
return false;
}
case eColorDepth_t::eColors16:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x/2);
if(idx_col_x % 2){
pixel_color_idx = buf[pixel_buffer_idx] & 0x0F;
}
else{
pixel_color_idx = buf[pixel_buffer_idx] >> 4;
}
break;
case eColorDepth_t::eColors256:
pixel_buffer_idx = (idx_row_y * update_width_x_bytes) + (idx_col_x);
pixel_color_idx = buf[pixel_buffer_idx];
break;
default:
break;
}
loc = ((idx_col_x + offset_col_px) * (this->fbbpp / 8)) + ((idx_row_y + offset_row_px) * fblinelen);
if(pixel_color_idx > (sizeof(color_palette) / sizeof (color_palette[0]))){
LOGWARN("Calculated pixel color that is out of bounds: %04X", pixel_buffer_idx);
return false;
}
uint32_t data_idx, red, green, blue;
loc = ((idx_col_x + offset_col_px) * (this->fbbpp / 8)) + ((idx_row_y + offset_row_px) * fblinelen);
data_idx = (uint32_t)color_palette[(pixel_color_idx*4)];
red = (uint32_t)color_palette[(pixel_color_idx*4)+1];
green = (uint32_t)color_palette[(pixel_color_idx*4)+2];
blue = (uint32_t)color_palette[(pixel_color_idx*4)+3];
uint32_t data_idx, red, green, blue;
blue >>= (8 - fbinfo.red.length);
green >>= (8 - fbinfo.green.length);
red >>= (8 - fbinfo.blue.length);
data_idx = (uint32_t)color_palette[(pixel_color_idx*4)];
red = (uint32_t)color_palette[(pixel_color_idx*4)+1];
green = (uint32_t)color_palette[(pixel_color_idx*4)+2];
blue = (uint32_t)color_palette[(pixel_color_idx*4)+3];
blue >>= (8 - fbinfo.red.length);
green >>= (8 - fbinfo.green.length);
red >>= (8 - fbinfo.blue.length);
uint32_t fb_pixel = (red << fbinfo.red.offset) |
(green << fbinfo.green.offset)|
(blue << fbinfo.blue.offset);
uint32_t fb_pixel = (red << fbinfo.red.offset) |
(green << fbinfo.green.offset)|
(blue << fbinfo.blue.offset);
if(random_print == (idx_col_x * idx_row_y)){
LOGDEBUG("idx:%d (%02X) [%02X %02X %02X %02X] fb_pixel:%08X ", pixel_color_idx, pixel_color_idx, data_idx, red, green, blue, fb_pixel);
@ -746,7 +761,6 @@ bool SCSIPowerView::WriteFrameBuffer(const DWORD *cdb, const BYTE *buf, const DW
*(this->fb + loc + 1) = (BYTE)((fb_pixel >> 8) & 0xFF);
*(this->fb + loc + 0) = (BYTE)((fb_pixel) & 0xFF);
}
}