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backend: gl: handle blur mask 

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2022-08-24 19:49:16 +01:00
parent e680e8b30d
commit 6b7a5dd6cf
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GPG Key ID: D3A4405BE6CC17F4
2 changed files with 100 additions and 13 deletions
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108
src/backend/gl/gl_common.c
View File

@ -516,7 +516,7 @@ static void _gl_compose(backend_t *base, struct backend_image *img, GLuint targe
/// Convert rectangles in X coordinates to OpenGL vertex and texture coordinates
/// @param[in] nrects, rects rectangles
/// @param[in] dst_x, dst_y origin of the OpenGL texture, affect the calculated texture
/// @param[in] image_dst origin of the OpenGL texture, affect the calculated texture
/// coordinates
/// @param[in] texture_height height of the OpenGL texture
/// @param[in] root_height height of the back buffer
@ -617,7 +617,8 @@ void gl_compose(backend_t *base, void *image_data, coord_t image_dst, void *mask
* Blur contents in a particular region.
*/
bool gl_kernel_blur(backend_t *base, double opacity, void *ctx, const rect_t *extent,
const GLuint vao[2], const int vao_nelems[2]) {
struct backend_image *mask, coord_t mask_dst, const GLuint vao[2],
const int vao_nelems[2]) {
auto bctx = (struct gl_blur_context *)ctx;
auto gd = (struct gl_data *)base;
@ -646,11 +647,20 @@ bool gl_kernel_blur(backend_t *base, double opacity, void *ctx, const rect_t *ex
tex_height = src_size.height;
}
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, src_texture);
glUseProgram(p->prog);
glUniform2f(p->uniform_pixel_norm, 1.0F / (GLfloat)tex_width,
1.0F / (GLfloat)tex_height);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gd->default_mask_texture);
glUniform1i(p->uniform_mask_tex, 1);
glUniform2f(p->uniform_mask_offset, 0.0F, 0.0F);
glUniform1i(p->uniform_mask_inverted, 0);
glUniform1f(p->uniform_mask_corner_radius, 0.0F);
// The number of indices in the selected vertex array
GLsizei nelems;
@ -673,7 +683,18 @@ bool gl_kernel_blur(backend_t *base, double opacity, void *ctx, const rect_t *ex
glUniform1f(p->uniform_opacity, 1.0F);
} else {
// last pass, draw directly into the back buffer, with origin
// regions
// regions. And apply mask if requested
if (mask) {
auto inner = (struct gl_texture *)mask->inner;
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, inner->texture);
glUniform1i(p->uniform_mask_inverted, mask->color_inverted);
glUniform1f(p->uniform_mask_corner_radius,
(float)mask->corner_radius);
glUniform2f(
p->uniform_mask_offset, (float)(mask_dst.x),
(float)(bctx->fb_height - mask_dst.y - inner->height));
}
glBindVertexArray(vao[0]);
nelems = vao_nelems[0];
glBindFramebuffer(GL_FRAMEBUFFER, gd->back_fbo);
@ -694,6 +715,7 @@ bool gl_kernel_blur(backend_t *base, double opacity, void *ctx, const rect_t *ex
}
bool gl_dual_kawase_blur(backend_t *base, double opacity, void *ctx, const rect_t *extent,
struct backend_image *mask, coord_t mask_dst,
const GLuint vao[2], const int vao_nelems[2]) {
auto bctx = (struct gl_blur_context *)ctx;
auto gd = (struct gl_data *)base;
@ -769,7 +791,15 @@ bool gl_dual_kawase_blur(backend_t *base, double opacity, void *ctx, const rect_
// The number of indices in the selected vertex array
GLsizei nelems;
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, src_texture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gd->default_mask_texture);
glUniform1i(up_pass->uniform_mask_tex, 1);
glUniform2f(up_pass->uniform_mask_offset, 0.0F, 0.0F);
glUniform1i(up_pass->uniform_mask_inverted, 0);
glUniform1f(up_pass->uniform_mask_corner_radius, 0.0F);
if (i > 0) {
assert(bctx->blur_fbos[i - 1]);
@ -782,6 +812,18 @@ bool gl_dual_kawase_blur(backend_t *base, double opacity, void *ctx, const rect_
glUniform1f(up_pass->uniform_opacity, (GLfloat)1);
} else {
// last pass, draw directly into the back buffer
if (mask) {
auto inner = (struct gl_texture *)mask->inner;
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, inner->texture);
glUniform1i(up_pass->uniform_mask_inverted,
mask->color_inverted);
glUniform1f(up_pass->uniform_mask_corner_radius,
(float)mask->corner_radius);
glUniform2f(
up_pass->uniform_mask_offset, (float)(mask_dst.x),
(float)(bctx->fb_height - mask_dst.y - inner->height));
}
glBindVertexArray(vao[0]);
nelems = vao_nelems[0];
glBindFramebuffer(GL_FRAMEBUFFER, gd->back_fbo);
@ -799,9 +841,8 @@ bool gl_dual_kawase_blur(backend_t *base, double opacity, void *ctx, const rect_
return true;
}
bool gl_blur(backend_t *base, double opacity, void *ctx, void *mask attr_unused,
coord_t mask_dst attr_unused, const region_t *reg_blur,
const region_t *reg_visible attr_unused) {
bool gl_blur(backend_t *base, double opacity, void *ctx, void *mask, coord_t mask_dst,
const region_t *reg_blur, const region_t *reg_visible attr_unused) {
auto bctx = (struct gl_blur_context *)ctx;
auto gd = (struct gl_data *)base;
@ -910,12 +951,17 @@ bool gl_blur(backend_t *base, double opacity, void *ctx, void *mask attr_unused,
int vao_nelems[2] = {nrects * 6, nrects_resized * 6};
if (bctx->method == BLUR_METHOD_DUAL_KAWASE) {
ret = gl_dual_kawase_blur(base, opacity, ctx, extent_resized, vao, vao_nelems);
ret = gl_dual_kawase_blur(base, opacity, ctx, extent_resized, mask,
mask_dst, vao, vao_nelems);
} else {
ret = gl_kernel_blur(base, opacity, ctx, extent_resized, vao, vao_nelems);
ret = gl_kernel_blur(base, opacity, ctx, extent_resized, mask, mask_dst,
vao, vao_nelems);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
@ -1011,6 +1057,15 @@ static const char dummy_frag[] = GLSL(330,
}
);
static const char copy_with_mask_frag[] = GLSL(330,
uniform sampler2D tex;
in vec2 texcoord;
float mask_factor();
void main() {
gl_FragColor = texelFetch(tex, ivec2(texcoord.xy), 0) * mask_factor();
}
);
static const char fill_frag[] = GLSL(330,
uniform vec4 color;
void main() {
@ -1210,6 +1265,7 @@ void gl_destroy_blur_context(backend_t *base attr_unused, void *ctx) {
gl_check_err();
}
const char *masking_glsl;
/**
* Initialize GL blur filters.
*/
@ -1253,11 +1309,12 @@ bool gl_create_kernel_blur_context(void *blur_context, GLfloat *projection,
uniform float opacity;
in vec2 texcoord;
out vec4 out_color;
float mask_factor();
void main() {
vec2 uv = texcoord * pixel_norm;
vec4 sum = vec4(0.0, 0.0, 0.0, 0.0);
%s //body of the convolution
out_color = sum / float(%.7g) * opacity;
out_color = sum / float(%.7g) * opacity * mask_factor();
}
);
static const char *FRAG_SHADER_BLUR_ADD = QUOTE(
@ -1348,7 +1405,9 @@ bool gl_create_kernel_blur_context(void *blur_context, GLfloat *projection,
free(shader_body);
// Build program
pass->prog = gl_create_program_from_str(vertex_shader, shader_str);
pass->prog = gl_create_program_from_strv(
(const char *[]){vertex_shader, NULL},
(const char *[]){shader_str, masking_glsl, NULL});
free(shader_str);
if (!pass->prog) {
log_error("Failed to create GLSL program.");
@ -1360,6 +1419,14 @@ bool gl_create_kernel_blur_context(void *blur_context, GLfloat *projection,
// Get uniform addresses
bind_uniform(pass, pixel_norm);
bind_uniform(pass, opacity);
bind_uniform(pass, mask_tex);
bind_uniform(pass, mask_offset);
bind_uniform(pass, mask_inverted);
bind_uniform(pass, mask_corner_radius);
log_info("Uniform locations: %d %d %d %d %d", pass->uniform_mask_tex,
pass->uniform_mask_offset, pass->uniform_mask_inverted,
pass->uniform_mask_corner_radius, pass->uniform_opacity);
pass->texorig_loc = glGetUniformLocationChecked(pass->prog, "texorig");
// Setup projection matrix
@ -1376,10 +1443,16 @@ bool gl_create_kernel_blur_context(void *blur_context, GLfloat *projection,
// Generate an extra null pass so we don't need special code path for
// the single pass case
auto pass = &ctx->blur_shader[1];
pass->prog = gl_create_program_from_str(vertex_shader, dummy_frag);
pass->prog = gl_create_program_from_strv(
(const char *[]){vertex_shader, NULL},
(const char *[]){copy_with_mask_frag, masking_glsl, NULL});
pass->uniform_pixel_norm = -1;
pass->uniform_opacity = -1;
pass->texorig_loc = glGetUniformLocationChecked(pass->prog, "texorig");
bind_uniform(pass, mask_tex);
bind_uniform(pass, mask_offset);
bind_uniform(pass, mask_inverted);
bind_uniform(pass, mask_corner_radius);
// Setup projection matrix
glUseProgram(pass->prog);
@ -1501,6 +1574,7 @@ bool gl_create_dual_kawase_blur_context(void *blur_context, GLfloat *projection,
uniform float opacity;
in vec2 texcoord;
out vec4 out_color;
float mask_factor();
void main() {
vec2 offset = %.7g * pixel_norm;
vec2 uv = texcoord * pixel_norm / (2 * scale);
@ -1512,7 +1586,7 @@ bool gl_create_dual_kawase_blur_context(void *blur_context, GLfloat *projection,
sum += texture2D(tex_src, uv + vec2(0.5, -0.5) * offset) * 2.0;
sum += texture2D(tex_src, uv + vec2(0.0, -1.0) * offset);
sum += texture2D(tex_src, uv + vec2(-0.5, -0.5) * offset) * 2.0;
out_color = sum / 12.0 * opacity;
out_color = sum / 12.0 * opacity * mask_factor();
}
);
// clang-format on
@ -1527,7 +1601,9 @@ bool gl_create_dual_kawase_blur_context(void *blur_context, GLfloat *projection,
CHECK((size_t)real_shader_len < shader_len);
// Build program
up_pass->prog = gl_create_program_from_str(vertex_shader, shader_str);
up_pass->prog = gl_create_program_from_strv(
(const char *[]){vertex_shader, NULL},
(const char *[]){shader_str, masking_glsl, NULL});
free(shader_str);
if (!up_pass->prog) {
log_error("Failed to create GLSL program.");
@ -1539,6 +1615,12 @@ bool gl_create_dual_kawase_blur_context(void *blur_context, GLfloat *projection,
// Get uniform addresses
bind_uniform(up_pass, pixel_norm);
bind_uniform(up_pass, opacity);
bind_uniform(up_pass, mask_tex);
bind_uniform(up_pass, mask_offset);
bind_uniform(up_pass, mask_inverted);
bind_uniform(up_pass, mask_corner_radius);
up_pass->texorig_loc =
glGetUniformLocationChecked(up_pass->prog, "texorig");
up_pass->scale_loc = glGetUniformLocationChecked(up_pass->prog, "scale");

5
src/backend/gl/gl_common.h
View File

@ -59,6 +59,11 @@ typedef struct {
GLint uniform_opacity;
GLint texorig_loc;
GLint scale_loc;
GLint uniform_mask_tex;
GLint uniform_mask_offset;
GLint uniform_mask_corner_radius;
GLint uniform_mask_inverted;
} gl_blur_shader_t;
typedef struct {