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Image: Add a method for detecting signed values

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This commit is contained in:
BlueCube3310 2024-06-05 16:22:11 +02:00
parent db76de5de8
commit 76c8211653
4 changed files with 31 additions and 37 deletions
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27
core/io/image.cpp
View file

@ -3824,6 +3824,33 @@ void Image::bump_map_to_normal_map(float bump_scale) {
data = result_image;
}
bool Image::detect_signed(bool p_include_mips) const {
ERR_FAIL_COND_V(is_compressed(), false);
if (format >= Image::FORMAT_RH && format <= Image::FORMAT_RGBAH) {
const uint16_t *img_data = reinterpret_cast<const uint16_t *>(data.ptr());
const uint64_t img_size = p_include_mips ? (data.size() / 2) : (width * height * get_format_pixel_size(format) / 2);
for (uint64_t i = 0; i < img_size; i++) {
if ((img_data[i] & 0x8000) != 0 && (img_data[i] & 0x7fff) != 0) {
return true;
}
}
} else if (format >= Image::FORMAT_RF && format <= Image::FORMAT_RGBAF) {
const uint32_t *img_data = reinterpret_cast<const uint32_t *>(data.ptr());
const uint64_t img_size = p_include_mips ? (data.size() / 4) : (width * height * get_format_pixel_size(format) / 4);
for (uint64_t i = 0; i < img_size; i++) {
if ((img_data[i] & 0x80000000) != 0 && (img_data[i] & 0x7fffffff) != 0) {
return true;
}
}
}
return false;
}
void Image::srgb_to_linear() {
if (data.size() == 0) {
return;

2
core/io/image.h
View file

@ -391,6 +391,8 @@ public:
Ref<Image> get_image_from_mipmap(int p_mipmap) const;
void bump_map_to_normal_map(float bump_scale = 1.0);
bool detect_signed(bool p_include_mips = true) const;
void blit_rect(const Ref<Image> &p_src, const Rect2i &p_src_rect, const Point2i &p_dest);
void blit_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2i &p_src_rect, const Point2i &p_dest);
void blend_rect(const Ref<Image> &p_src, const Rect2i &p_src_rect, const Point2i &p_dest);

27
modules/betsy/image_compress_betsy.cpp
View file

@ -49,31 +49,6 @@ static int get_next_multiple(int n, int m) {
return n + (m - (n % m));
}
static bool is_image_signed(const Image *r_img) {
if (r_img->get_format() >= Image::FORMAT_RH && r_img->get_format() <= Image::FORMAT_RGBAH) {
const uint16_t *img_data = reinterpret_cast<const uint16_t *>(r_img->ptr());
const uint64_t img_size = r_img->get_data_size() / 2;
for (uint64_t i = 0; i < img_size; i++) {
if ((img_data[i] & 0x8000) != 0 && (img_data[i] & 0x7fff) != 0) {
return true;
}
}
} else if (r_img->get_format() >= Image::FORMAT_RF && r_img->get_format() <= Image::FORMAT_RGBAF) {
const uint32_t *img_data = reinterpret_cast<const uint32_t *>(r_img->ptr());
const uint64_t img_size = r_img->get_data_size() / 4;
for (uint64_t i = 0; i < img_size; i++) {
if ((img_data[i] & 0x80000000) != 0 && (img_data[i] & 0x7fffffff) != 0) {
return true;
}
}
}
return false;
}
Error _compress_betsy(BetsyFormat p_format, Image *r_img) {
uint64_t start_time = OS::get_singleton()->get_ticks_msec();
@ -125,7 +100,7 @@ Error _compress_betsy(BetsyFormat p_format, Image *r_img) {
case BETSY_FORMAT_BC6: {
err = compute_shader->parse_versions_from_text(bc6h_shader_glsl);
if (is_image_signed(r_img)) {
if (r_img->detect_signed(true)) {
dest_format = Image::FORMAT_BPTC_RGBF;
version = "signed";
} else {

12
modules/cvtt/image_compress_cvtt.cpp
View file

@ -174,17 +174,7 @@ void image_compress_cvtt(Image *p_image, Image::UsedChannels p_channels) {
p_image->convert(Image::FORMAT_RGBH);
}
const uint8_t *rb = p_image->get_data().ptr();
const uint16_t *source_data = reinterpret_cast<const uint16_t *>(&rb[0]);
int pixel_element_count = w * h * 3;
for (int i = 0; i < pixel_element_count; i++) {
if ((source_data[i] & 0x8000) != 0 && (source_data[i] & 0x7fff) != 0) {
is_signed = true;
break;
}
}
is_signed = p_image->detect_signed();
target_format = is_signed ? Image::FORMAT_BPTC_RGBF : Image::FORMAT_BPTC_RGBFU;
} else {
p_image->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert