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use glsl built-in ifdef directive for extensions

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omigamedev
2019-01-30 14:00:56 +01:00
parent c516e8ae78
commit 489036a40c
1 changed files with 22 additions and 22 deletions
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44
src/app_shaders.cpp
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@@ -85,27 +85,27 @@ void App::initShaders()
"}\n";
static const char* shader_blend_f =
SHADER_VERSION
#ifdef __IOS__
"#extension GL_EXT_shader_framebuffer_fetch : enable\n"
#endif
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" #extension GL_EXT_shader_framebuffer_fetch : enable\n"
"#endif\n"
"uniform sampler2D tex;\n"
"uniform sampler2D tex_alpha;\n"
"uniform sampler2D tex_bg;\n"
"uniform mediump float alpha;\n"
"uniform int blend_mode;\n"
"in mediump vec2 uv;\n"
#ifdef __IOS__
"inout highp vec4 frag;\n"
#else
"out mediump vec4 frag;\n"
#endif
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" inout highp vec4 frag;\n"
"#else\n"
" out mediump vec4 frag;\n"
"#endif\n"
SHADER_FUNCTION_BLEND
"void main() {\n"
#ifdef __IOS__
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" highp vec4 bg = frag;\n"
#else
"#else\n"
" mediump vec4 bg = texture(tex_bg, uv);\n"
#endif
"#endif\n"
" mediump vec4 fg = vec4(texture(tex, uv).rgb, texture(tex_alpha, uv).a);\n"
" if (fg.a == 0.0) { frag = bg; return; }\n"
" mediump float contribution = (1.0 - bg.a) * fg.a;\n"
@@ -357,9 +357,9 @@ void App::initShaders()
"}\n";
static const char* shader_stroke_f =
SHADER_VERSION
#ifdef __IOS__
"#extension GL_EXT_shader_framebuffer_fetch : enable\n"
#endif
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" #extension GL_EXT_shader_framebuffer_fetch : enable\n"
"#endif\n"
"uniform mediump sampler2D tex;\n"
"uniform mediump sampler2D tex_bg;\n"
"uniform mediump sampler2D tex_stencil;\n"
@@ -375,22 +375,22 @@ void App::initShaders()
"in mediump vec2 uv;\n"
"in mediump vec2 uv_2;\n"
"in mediump float q;\n"
#ifdef __IOS__
"inout mediump vec4 frag;\n"
#else
"out mediump vec4 frag;\n"
#endif
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" inout mediump vec4 frag;\n"
"#else\n"
" out mediump vec4 frag;\n"
"#endif\n"
SHADER_FUNCTION_RAND
"void main() {\n"
" mediump vec2 uv2 = gl_FragCoord.st / resolution;\n"
" mediump float stencil = 1.0 - (texture(tex_stencil, (uv2+stencil_offset) * 5.0).r) * stencil_alpha;\n"
" mediump float brush_alpha = ( 1.0 - texture(tex, uv/q).r ) * alpha;\n"
" mediump vec4 fg = vec4(col.rgb, brush_alpha * stencil);\n"
#ifdef __IOS__
"#if defined(GL_EXT_shader_framebuffer_fetch)\n"
" mediump vec4 bg = frag;\n"
#else
"#else\n"
" mediump vec4 bg = texture(tex_bg, uv2);\n"
#endif
"#endif\n"
" fg.a *= 1.0-rand(uv2+uv)*noise;\n"
" if (fg.a == 0.0) discard;\n"
" if (mix_alpha > 0.0){\n"