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renderer-egl: Only copy damaged regions

pull/6/head
Andri Yngvason 2022-04-09 16:21:17 +00:00
parent 698ac6947b
commit ed4c8b1cd0
1 changed files with 50 additions and 11 deletions
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55
src/renderer-egl.c
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@ -64,6 +64,7 @@ static EGLDisplay egl_display = EGL_NO_DISPLAY;
static EGLContext egl_context = EGL_NO_CONTEXT;
static GLuint shader_program = 0;
static GLuint texture = 0;
static const char *vertex_shader_src =
"attribute vec2 pos;\n"
@ -195,6 +196,8 @@ failure:
void egl_finish(void)
{
if (texture)
glDeleteTextures(1, &texture);
if (shader_program)
glDeleteProgram(shader_program);
eglDestroyContext(egl_display, egl_context);
@ -317,10 +320,32 @@ GLenum gl_format_from_drm(uint32_t format)
return 0;
}
/* Possible improvements:
* - Hold onto imported textures and only import damaged areas
* - Only render the damaged areas on the buffer
*/
void import_image_with_damage(const struct image* src,
struct pixman_region16* damage)
{
GLenum fmt = gl_format_from_drm(src->format);
int n_rects = 0;
struct pixman_box16* rects =
pixman_region_rectangles(damage, &n_rects);
for (int i = 0; i < n_rects; ++i) {
int x = rects[i].x1;
int y = rects[i].y1;
int width = rects[i].x2 - x;
int height = rects[i].y2 - y;
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, x);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, y);
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, fmt,
GL_UNSIGNED_BYTE, src->pixels);
}
glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0);
}
void render_image_egl(struct buffer* dst, const struct image* src,
double scale, int x_pos, int y_pos)
{
@ -332,9 +357,12 @@ void render_image_egl(struct buffer* dst, const struct image* src,
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
GLuint tex = 0;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
bool is_new_texture = !texture;
if (!texture)
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
@ -343,9 +371,14 @@ void render_image_egl(struct buffer* dst, const struct image* src,
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, src->stride / 4);
if (is_new_texture) {
GLenum fmt = gl_format_from_drm(src->format);
glTexImage2D(GL_TEXTURE_2D, 0, fmt, src->width, src->height, 0,
fmt, GL_UNSIGNED_BYTE, src->pixels);
} else {
import_image_with_damage(src,
(struct pixman_region16*)src->damage);
}
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
@ -355,11 +388,17 @@ void render_image_egl(struct buffer* dst, const struct image* src,
glUseProgram(shader_program);
struct pixman_box16* ext = pixman_region_extents(&dst->damage);
glScissor(ext->x1, ext->y1, ext->x2 - ext->x1, ext->y2 - ext->y1);
glEnable(GL_SCISSOR_TEST);
gl_draw();
glDisable(GL_SCISSOR_TEST);
glFinish();
glBindTexture(GL_TEXTURE_2D, 0);
glDeleteTextures(1, &tex);
glBindFramebuffer(GL_FRAMEBUFFER, 0);