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Graphics: Switch glyph atlases to R8 instead of A8

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A8 can't be supported efficiently on API lacking texture swizzle support (DX, WebGL, WebGPU), so we swizzle in the shader instead
This commit is contained in:
SirLynix
2023-02-22 19:11:41 +01:00
parent b38f9dc79b
commit 5833ce573d
10 changed files with 46 additions and 13 deletions
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18
src/Nazara/OpenGLRenderer/OpenGLTexture.cpp
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@@ -54,12 +54,20 @@ namespace Nz
if (!context.DidLastCallSucceed())
throw std::runtime_error("failed to create texture");
#ifndef NAZARA_PLATFORM_WEB
m_texture.SetParameteri(GL_TEXTURE_MAX_LEVEL, m_textureInfo.levelCount);
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_R, format->swizzleR);
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_G, format->swizzleG);
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_B, format->swizzleB);
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_A, format->swizzleA);
#ifndef NAZARA_PLATFORM_WEB
if (format->swizzleR != GL_RED)
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_R, format->swizzleR);
if (format->swizzleG != GL_GREEN)
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_G, format->swizzleG);
if (format->swizzleB != GL_BLUE)
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_B, format->swizzleB);
if (format->swizzleA != GL_ALPHA)
m_texture.SetParameteri(GL_TEXTURE_SWIZZLE_A, format->swizzleA);
#endif
}