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new glx: implement blur

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This is barely tested, so bugs and/or performance problems to be
expected.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-03-10 01:22:38 +00:00
parent 710ff2fd42
commit 48338a9903
4 changed files with 194 additions and 321 deletions
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15
src/backend/gl/gl_common.h
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@@ -28,16 +28,12 @@ typedef struct {
// Program and uniforms for blur shader
typedef struct {
/// Fragment shader for blur.
GLuint frag_shader;
/// GLSL program for blur.
GLuint prog;
/// Location of uniform "offset_x" in blur GLSL program.
GLint unifm_offset_x;
/// Location of uniform "offset_y" in blur GLSL program.
GLint unifm_offset_y;
/// Location of uniform "factor_center" in blur GLSL program.
GLint unifm_factor_center;
} gl_blur_shader_t;
/// @brief Wrapper of a binded GLX texture.
@@ -59,9 +55,18 @@ struct gl_data {
backend_t base;
// Height and width of the viewport
int height, width;
int npasses;
gl_win_shader_t win_shader;
gl_blur_shader_t blur_shader[MAX_BLUR_PASS];
bool non_power_of_two_texture;
// Temporary textures used for blurring. They are always the same size as the
// target, so they are always big enough without resizing.
// Turns out calling glTexImage to resize is expensive, so we avoid that.
GLuint blur_texture[2];
// Temporary fbo used for blurring
GLuint blur_fbo;
GLenum blur_texture_target;
};
typedef struct {
@@ -92,8 +97,6 @@ void gl_compose(backend_t *, void *ptex, int dst_x, int dst_y, const region_t *r
void gl_resize(struct gl_data *, int width, int height);
GLuint glGetUniformLocationChecked(GLuint p, const char *name);
bool gl_init(struct gl_data *gd, session_t *);
void gl_deinit(struct gl_data *gd);