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[client] egl: corrected fps alpha blending

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This commit is contained in:
Geoffrey McRae 2018-12-12 22:38:08 +11:00
parent abfe3a9b4d
commit 42fa0e1d1f
1 changed files with 53 additions and 18 deletions
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57
client/renderers/egl/fps.c
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@ -35,6 +35,7 @@ struct EGL_FPS
EGL_Texture * texture; EGL_Texture * texture;
EGL_Shader * shader; EGL_Shader * shader;
EGL_Shader * shaderBG;
EGL_Model * model; EGL_Model * model;
bool ready; bool ready;
@ -42,6 +43,7 @@ struct EGL_FPS
// uniforms // uniforms
GLint uScreen , uSize; GLint uScreen , uSize;
GLint uScreenBG, uSizeBG;
}; };
static const char vertex_shader[] = "\ static const char vertex_shader[] = "\
@ -81,20 +83,25 @@ uniform sampler2D sampler1;\
\ \
void main()\ void main()\
{\ {\
highp vec4 tmp = texture(sampler1, uv);\ color = texture(sampler1, uv);\
color.r = tmp.b; \
color.g = tmp.g; \
color.b = tmp.r; \
color.a = tmp.a; \
if (color.a == 0.0) \
{\
color.a = 0.5; \
color.r = 0.0; \
color.g = 0.0; \
}\
}\ }\
"; ";
static const char frag_shaderBG[] = "\
#version 300 es\n\
\
in highp vec2 uv;\
out highp vec4 color;\
\
uniform sampler2D sampler1;\
\
void main()\
{\
color = vec4(0.0, 0.0, 1.0, 0.5);\
}\
";
bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj) bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj)
{ {
*fps = (EGL_FPS *)malloc(sizeof(EGL_FPS)); *fps = (EGL_FPS *)malloc(sizeof(EGL_FPS));
@ -121,6 +128,13 @@ bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj)
return false; return false;
} }
if (!egl_shader_init(&(*fps)->shaderBG))
{
DEBUG_ERROR("Failed to initialize the fps bg shader");
return false;
}
if (!egl_shader_compile((*fps)->shader, if (!egl_shader_compile((*fps)->shader,
vertex_shader, sizeof(vertex_shader), vertex_shader, sizeof(vertex_shader),
frag_shader , sizeof(frag_shader ))) frag_shader , sizeof(frag_shader )))
@ -129,8 +143,19 @@ bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj)
return false; return false;
} }
if (!egl_shader_compile((*fps)->shaderBG,
vertex_shader, sizeof(vertex_shader),
frag_shaderBG, sizeof(frag_shaderBG)))
{
DEBUG_ERROR("Failed to compile the fps shader");
return false;
}
(*fps)->uSize = egl_shader_get_uniform_location((*fps)->shader , "size" ); (*fps)->uSize = egl_shader_get_uniform_location((*fps)->shader , "size" );
(*fps)->uScreen = egl_shader_get_uniform_location((*fps)->shader , "screen"); (*fps)->uScreen = egl_shader_get_uniform_location((*fps)->shader , "screen");
(*fps)->uSizeBG = egl_shader_get_uniform_location((*fps)->shaderBG, "size" );
(*fps)->uScreenBG = egl_shader_get_uniform_location((*fps)->shaderBG, "screen");
if (!egl_model_init(&(*fps)->model)) if (!egl_model_init(&(*fps)->model))
{ {
@ -151,6 +176,7 @@ void egl_fps_free(EGL_FPS ** fps)
egl_texture_free(&(*fps)->texture ); egl_texture_free(&(*fps)->texture );
egl_shader_free (&(*fps)->shader ); egl_shader_free (&(*fps)->shader );
egl_shader_free (&(*fps)->shaderBG);
egl_model_free (&(*fps)->model ); egl_model_free (&(*fps)->model );
free(*fps); free(*fps);
@ -198,9 +224,18 @@ void egl_fps_render(EGL_FPS * fps, float screenWidth, float screenHeight)
glEnable(GL_BLEND); glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// render the background first
egl_shader_use(fps->shaderBG);
glUniform2f(fps->uScreenBG, screenWidth, screenHeight);
glUniform2f(fps->uSizeBG , fps->width , fps->height );
egl_model_render(fps->model);
// render the texture over the background
egl_shader_use(fps->shader); egl_shader_use(fps->shader);
glUniform2f(fps->uScreen, screenWidth, screenHeight); glUniform2f(fps->uScreen, screenWidth, screenHeight);
glUniform2f(fps->uSize , fps->width , fps->height ); glUniform2f(fps->uSize , fps->width , fps->height );
egl_model_render(fps->model); egl_model_render(fps->model);
glDisable(GL_BLEND); glDisable(GL_BLEND);
} }