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Fix RGB565 for certain resolutions
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This commit is contained in:
Mike Bell 2024-10-13 20:34:04 +01:00
parent 58dba1f0bf
commit d67479563f
1 changed files with 25 additions and 8 deletions
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31
drivers/dvhstx/dvhstx.cpp
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@ -160,17 +160,34 @@ void __scratch_x("display") DVHSTX::gfx_dma_handler() {
if (line_bytes_per_pixel == 2) { if (line_bytes_per_pixel == 2) {
uint16_t* src_ptr = (uint16_t*)&frame_buffer_display[y * 2 * (timing_mode->h_active_pixels >> h_repeat_shift)]; uint16_t* src_ptr = (uint16_t*)&frame_buffer_display[y * 2 * (timing_mode->h_active_pixels >> h_repeat_shift)];
for (int i = 0; i < timing_mode->h_active_pixels >> 1; i += 2) { if (h_repeat_shift == 2) {
uint32_t val = (uint32_t)(*src_ptr++) * 0x10001; for (int i = 0; i < timing_mode->h_active_pixels >> 1; i += 2) {
*dst_ptr++ = val; uint32_t val = (uint32_t)(*src_ptr++) * 0x10001;
*dst_ptr++ = val; *dst_ptr++ = val;
*dst_ptr++ = val;
}
}
else {
for (int i = 0; i < timing_mode->h_active_pixels >> 1; ++i) {
uint32_t val = (uint32_t)(*src_ptr++) * 0x10001;
*dst_ptr++ = val;
}
} }
} }
else if (line_bytes_per_pixel == 1) { else if (line_bytes_per_pixel == 1) {
uint8_t* src_ptr = &frame_buffer_display[y * (timing_mode->h_active_pixels >> h_repeat_shift)]; uint8_t* src_ptr = &frame_buffer_display[y * (timing_mode->h_active_pixels >> h_repeat_shift)];
for (int i = 0; i < timing_mode->h_active_pixels >> 2; ++i) { if (h_repeat_shift == 2) {
uint32_t val = (uint32_t)(*src_ptr++) * 0x01010101; for (int i = 0; i < timing_mode->h_active_pixels >> 2; ++i) {
*dst_ptr++ = val; uint32_t val = (uint32_t)(*src_ptr++) * 0x01010101;
*dst_ptr++ = val;
}
}
else {
for (int i = 0; i < timing_mode->h_active_pixels >> 2; ++i) {
uint32_t val = ((uint32_t)(*src_ptr++) * 0x0101);
val |= ((uint32_t)(*src_ptr++) * 0x01010000);
*dst_ptr++ = val;
}
} }
} }
else if (line_bytes_per_pixel == 4) { else if (line_bytes_per_pixel == 4) {