diff options
| author | Rémi Verschelde <rverschelde@gmail.com> | 2020-01-03 14:29:19 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-01-03 14:29:19 +0100 |
| commit | 136846a6ec4f01eea4ecfbd5b624b1145730288c (patch) | |
| tree | 5683c66e2cedb8dd013f78f782dfac48e07fa701 | |
| parent | fa82664419f644c410980a045839ccbc7f483c22 (diff) | |
| parent | 7a9fc69a16d2cf29e0f5b4388869c29c4c5e8dd3 (diff) | |
Merge pull request #34772 from clayjohn/ETC-support-alpha
Fallback to RGBA4444 for textures with alpha set to ETC compression
| -rw-r--r-- | core/image.cpp | 32 | ||||
| -rw-r--r-- | modules/etc/image_etc.cpp | 7 |
2 files changed, 23 insertions, 16 deletions
diff --git a/core/image.cpp b/core/image.cpp index 5f99fe1532..672f850a1f 100644 --- a/core/image.cpp +++ b/core/image.cpp @@ -2432,19 +2432,19 @@ Color Image::get_pixel(int p_x, int p_y) const { } case FORMAT_RGBA4444: { uint16_t u = ((uint16_t *)ptr)[ofs]; - float r = (u & 0xF) / 15.0; - float g = ((u >> 4) & 0xF) / 15.0; - float b = ((u >> 8) & 0xF) / 15.0; - float a = ((u >> 12) & 0xF) / 15.0; + float r = ((u >> 12) & 0xF) / 15.0; + float g = ((u >> 8) & 0xF) / 15.0; + float b = ((u >> 4) & 0xF) / 15.0; + float a = (u & 0xF) / 15.0; return Color(r, g, b, a); } case FORMAT_RGBA5551: { uint16_t u = ((uint16_t *)ptr)[ofs]; - float r = (u & 0x1F) / 15.0; - float g = ((u >> 5) & 0x1F) / 15.0; - float b = ((u >> 10) & 0x1F) / 15.0; - float a = ((u >> 15) & 0x1) / 1.0; + float r = ((u >> 11) & 0x1F) / 15.0; + float g = ((u >> 6) & 0x1F) / 15.0; + float b = ((u >> 1) & 0x1F) / 15.0; + float a = (u & 0x1) / 1.0; return Color(r, g, b, a); } case FORMAT_RF: { @@ -2558,10 +2558,10 @@ void Image::set_pixel(int p_x, int p_y, const Color &p_color) { uint16_t rgba = 0; - rgba = uint16_t(CLAMP(p_color.r * 15.0, 0, 15)); - rgba |= uint16_t(CLAMP(p_color.g * 15.0, 0, 15)) << 4; - rgba |= uint16_t(CLAMP(p_color.b * 15.0, 0, 15)) << 8; - rgba |= uint16_t(CLAMP(p_color.a * 15.0, 0, 15)) << 12; + rgba = uint16_t(CLAMP(p_color.r * 15.0, 0, 15)) << 12; + rgba |= uint16_t(CLAMP(p_color.g * 15.0, 0, 15)) << 8; + rgba |= uint16_t(CLAMP(p_color.b * 15.0, 0, 15)) << 4; + rgba |= uint16_t(CLAMP(p_color.a * 15.0, 0, 15)); ((uint16_t *)ptr)[ofs] = rgba; @@ -2570,10 +2570,10 @@ void Image::set_pixel(int p_x, int p_y, const Color &p_color) { uint16_t rgba = 0; - rgba = uint16_t(CLAMP(p_color.r * 31.0, 0, 31)); - rgba |= uint16_t(CLAMP(p_color.g * 31.0, 0, 31)) << 5; - rgba |= uint16_t(CLAMP(p_color.b * 31.0, 0, 31)) << 10; - rgba |= uint16_t(p_color.a > 0.5 ? 1 : 0) << 15; + rgba = uint16_t(CLAMP(p_color.r * 31.0, 0, 31)) << 11; + rgba |= uint16_t(CLAMP(p_color.g * 31.0, 0, 31)) << 6; + rgba |= uint16_t(CLAMP(p_color.b * 31.0, 0, 31)) << 1; + rgba |= uint16_t(p_color.a > 0.5 ? 1 : 0); ((uint16_t *)ptr)[ofs] = rgba; diff --git a/modules/etc/image_etc.cpp b/modules/etc/image_etc.cpp index 7cd5e2eb12..f0b95c893d 100644 --- a/modules/etc/image_etc.cpp +++ b/modules/etc/image_etc.cpp @@ -139,6 +139,13 @@ static void _compress_etc(Image *p_img, float p_lossy_quality, bool force_etc1_f return; } + if (img_format >= Image::FORMAT_RGBA8 && force_etc1_format) { + // If VRAM compression is using ETC, but image has alpha, convert to RGBA4444 + // This saves space while maintaining the alpha channel + p_img->convert(Image::FORMAT_RGBA4444); + return; + } + uint32_t imgw = p_img->get_width(), imgh = p_img->get_height(); Image::Format etc_format = force_etc1_format ? Image::FORMAT_ETC : _get_etc2_mode(detected_channels); |