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Add 16-bits TGA support

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(cherry picked from commit 200f6ac0894982b31c59acc11cd5f8d4f8971219)
This commit is contained in:
Ithamar R. Adema 2022-09-12 21:04:46 +02:00 committed by Relintai
parent 1aa0c81dc1
commit 1e1858ae15
2 changed files with 25 additions and 2 deletions
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25
modules/tga/image_loader_tga.cpp
View File

@ -100,7 +100,7 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff
uint32_t width = p_header.image_width;
uint32_t height = p_header.image_height;
tga_origin_e origin = static_cast<tga_origin_e>((p_header.image_descriptor & TGA_ORIGIN_MASK) >> TGA_ORIGIN_SHIFT);
uint8_t alpha_bits = p_header.image_descriptor & TGA_IMAGE_DESCRIPTOR_ALPHA_MASK;
uint32_t x_start;
int32_t x_step;
uint32_t x_end;
@ -184,6 +184,27 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff
y += y_step;
}
}
} else if (p_header.pixel_depth == 16) {
while (y != y_end) {
while (x != x_end) {
if (i + 1 >= p_input_size) {
return ERR_PARSE_ERROR;
}
// Always stored as RGBA5551
uint8_t r = (p_buffer[i + 1] & 0x7c) << 1;
uint8_t g = ((p_buffer[i + 1] & 0x03) << 6) | ((p_buffer[i + 0] & 0xe0) >> 2);
uint8_t b = (p_buffer[i + 0] & 0x1f) << 3;
uint8_t a = (p_buffer[i + 1] & 0x80) ? 0xff : 0;
TGA_PUT_PIXEL(r, g, b, alpha_bits ? a : 0xff);
x += x_step;
i += 2;
}
x = x_start;
y += y_step;
}
} else if (p_header.pixel_depth == 24) {
while (y != y_end) {
while (x != x_end) {
@ -286,7 +307,7 @@ Error ImageLoaderTGA::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
err = FAILED;
}
if (!(tga_header.pixel_depth == 8 || tga_header.pixel_depth == 24 || tga_header.pixel_depth == 32)) {
if (!(tga_header.pixel_depth == 8 || tga_header.pixel_depth == 16 || tga_header.pixel_depth == 24 || tga_header.pixel_depth == 32)) {
err = FAILED;
}

2
modules/tga/image_loader_tga.h
View File

@ -35,6 +35,8 @@
/**
@author SaracenOne
*/
#define TGA_IMAGE_DESCRIPTOR_ALPHA_MASK 0xf
class ImageLoaderTGA : public ImageFormatLoader {
enum tga_type_e {
TGA_TYPE_NO_DATA = 0,