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render: Flip textures in case of inverted_y

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This commit is contained in:
Guido Günther 2018-03-07 15:41:12 +01:00
parent 6c7e1c867c
commit 2d0db16942
4 changed files with 10 additions and 2 deletions
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7
render/gles2/shaders.c
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@ -50,6 +50,7 @@ const GLchar ellipse_fragment_src[] =
// Textured quads
const GLchar vertex_src[] =
"uniform mat4 proj;"
"uniform bool invert_y;"
"attribute vec2 pos;"
"attribute vec2 texcoord;"
"varying vec2 v_texcoord;"
@ -69,7 +70,11 @@ const GLchar vertex_src[] =
"}"
"void main() {"
" gl_Position = transpose(proj) * vec4(pos, 0.0, 1.0);"
" v_texcoord = texcoord;"
" if (invert_y) {"
" v_texcoord = vec2(texcoord.s, 1.0 - texcoord.t);"
" } else {"
" v_texcoord = texcoord;"
" }"
"}";
const GLchar fragment_src_rgba[] =