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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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71
client/renderers/egl/fps.c
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@ -35,13 +35,15 @@ struct EGL_FPS
EGL_Texture * texture;
EGL_Shader * shader;
EGL_Shader * shaderBG;
EGL_Model * model;
bool ready;
float width, height;
// uniforms
GLint uScreen, uSize;
GLint uScreen , uSize;
GLint uScreenBG, uSizeBG;
};
static const char vertex_shader[] = "\
@ -81,20 +83,25 @@ uniform sampler2D sampler1;\
\
void main()\
{\
highp vec4 tmp = 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; \
}\
color = texture(sampler1, uv);\
}\
";
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)
{
*fps = (EGL_FPS *)malloc(sizeof(EGL_FPS));
@ -121,16 +128,34 @@ bool egl_fps_init(EGL_FPS ** fps, const LG_Font * font, LG_FontObj fontObj)
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,
vertex_shader, sizeof(vertex_shader),
frag_shader, sizeof(frag_shader)))
frag_shader , sizeof(frag_shader )))
{
DEBUG_ERROR("Failed to compile the fps shader");
return false;
}
(*fps)->uSize = egl_shader_get_uniform_location((*fps)->shader, "size" );
(*fps)->uScreen = egl_shader_get_uniform_location((*fps)->shader, "screen");
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)->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))
{
@ -149,9 +174,10 @@ void egl_fps_free(EGL_FPS ** fps)
if (!*fps)
return;
egl_texture_free(&(*fps)->texture);
egl_shader_free (&(*fps)->shader );
egl_model_free (&(*fps)->model );
egl_texture_free(&(*fps)->texture );
egl_shader_free (&(*fps)->shader );
egl_shader_free (&(*fps)->shaderBG);
egl_model_free (&(*fps)->model );
free(*fps);
*fps = NULL;
@ -198,9 +224,18 @@ void egl_fps_render(EGL_FPS * fps, float screenWidth, float screenHeight)
glEnable(GL_BLEND);
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);
glUniform2f(fps->uScreen, screenWidth, screenHeight);
glUniform2f(fps->uSize , fps->width , fps->height );
egl_model_render(fps->model);
glDisable(GL_BLEND);
}