From 0b9ede26974c9c0cab0123f9391f695f79fc8766 Mon Sep 17 00:00:00 2001 From: ocornut Date: Mon, 7 Jun 2021 11:46:51 +0200 Subject: [PATCH] Shadows: Fix to support for colored-only font atlas. (4202) --- imgui_draw.cpp | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/imgui_draw.cpp b/imgui_draw.cpp index d97ca932..68cab827 100644 --- a/imgui_draw.cpp +++ b/imgui_draw.cpp @@ -3579,7 +3579,7 @@ static void GaussianBlur(float* data, int size) // Generate the actual pixel data for rounded corners in the atlas static void ImFontAtlasBuildRenderShadowTexData(ImFontAtlas* atlas) { - IM_ASSERT(atlas->TexPixelsAlpha8 != NULL); + IM_ASSERT(atlas->TexPixelsAlpha8 != NULL || atlas->TexPixelsRGBA32 != NULL); IM_ASSERT(atlas->ShadowRectIds[0] >= 0 && atlas->ShadowRectIds[1] >= 0); // Because of the blur, we have to generate the full 3x3 texture here, and then we chop that down to just the 2x2 section we need later. @@ -3626,9 +3626,13 @@ static void ImFontAtlasBuildRenderShadowTexData(ImFontAtlas* atlas) for (int y = 0; y < shadow_tex_size; y++) for (int x = 0; x < shadow_tex_size; x++) { - const float alpha = tex_data[x + (y * size)]; const unsigned int offset = (int)(r.X + x) + (int)(r.Y + y) * tex_w; - atlas->TexPixelsAlpha8[offset] = (unsigned char)(0xFF * alpha); + const float alpha_f = tex_data[x + (y * size)]; + const unsigned char alpha_8 = (unsigned char)(0xFF * alpha_f); + if (atlas->TexPixelsAlpha8) + atlas->TexPixelsAlpha8[offset] = alpha_8; + else + atlas->TexPixelsRGBA32[offset] = IM_COL32(255, 255, 255, alpha_8); } // Generate UVs for each of the nine sections, which are arranged in a 3x3 grid starting from 0 in the top-left and going across then down @@ -3696,9 +3700,13 @@ static void ImFontAtlasBuildRenderShadowTexData(ImFontAtlas* atlas) { const int src_x = ImClamp(x - src_x_offset, 0, size - 1); const int src_y = ImClamp(y - src_y_offset, 0, size - 1); - const float alpha = tex_data[src_x + (src_y * size)]; + const float alpha_f = tex_data[src_x + (src_y * size)]; + const unsigned char alpha_8 = (unsigned char)(0xFF * alpha_f); const unsigned int offset = (int)(r.X + x) + (int)(r.Y + y) * tex_w; - atlas->TexPixelsAlpha8[offset] = (unsigned char)(0xFF * alpha); + if (atlas->TexPixelsAlpha8) + atlas->TexPixelsAlpha8[offset] = alpha_8; + else + atlas->TexPixelsRGBA32[offset] = IM_COL32(255, 255, 255, alpha_8); } // Remove the padding we added