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Add dmabuf import & render

shader-damage
Andri Yngvason 2019-10-06 14:08:52 +00:00
parent 838570a4f9
commit 0dceb98f79
1 changed files with 99 additions and 1 deletions
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100
src/render.c
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@ -44,6 +44,27 @@ struct renderer {
EGLSurface surface;
EGLContext context;
GLuint shader_program;
uint32_t width;
uint32_t height;
GLint read_format;
GLint read_type;
};
struct dmabuf_plane {
int fd;
uint32_t offset;
uint32_t size;
uint32_t pitch;
uint64_t modifier;
};
struct dmabuf_frame {
uint32_t width;
uint32_t height;
uint32_t format;
uint32_t n_planes;
struct dmabuf_plane plane[4];
};
static inline void* gl_load_single_extension(const char* name)
@ -240,7 +261,7 @@ void renderer_destroy(struct renderer* self)
glDeleteProgram(self->shader_program);
}
int renderer_init(struct renderer* self, int width, int height)
int renderer_init(struct renderer* self, uint32_t width, uint32_t height)
{
if (!eglBindAPI(EGL_OPENGL_ES_API))
return -1;
@ -308,6 +329,11 @@ int renderer_init(struct renderer* self, int width, int height)
glUseProgram(self->shader_program);
self->width = width;
self->height = height;
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT, &self->read_format);
glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE, &self->read_type);
glViewport(0, 0, width, height);
gl_clear();
@ -321,3 +347,75 @@ surface_failure:
eglDestroyContext(self->display, self->context);
return -1;
}
static inline void append_attr(EGLint* dst, int* i, EGLint name, EGLint value)
{
dst[*i] = name;
i[0] += 1;
dst[*i] = value;
i[0] += 1;
}
static void dmabuf_attr_append_planes(EGLint* dst, int* i,
struct dmabuf_frame* frame)
{
#define APPEND_PLANE_ATTR(n) \
if (frame->n_planes <= n) \
return; \
\
append_attr(dst, i, EGL_DMA_BUF_PLANE##n##_FD_EXT, frame->plane[n].fd); \
append_attr(dst, i, EGL_DMA_BUF_PLANE##n##_OFFSET_EXT, frame->plane[n].offset); \
append_attr(dst, i, EGL_DMA_BUF_PLANE##n##_PITCH_EXT, frame->plane[n].pitch); \
append_attr(dst, i, EGL_DMA_BUF_PLANE##n##_MODIFIER_LO_EXT, frame->plane[n].modifier); \
append_attr(dst, i, EGL_DMA_BUF_PLANE##n##_MODIFIER_HI_EXT, frame->plane[n].modifier >> 32); \
APPEND_PLANE_ATTR(0);
APPEND_PLANE_ATTR(1);
APPEND_PLANE_ATTR(2);
APPEND_PLANE_ATTR(3);
#undef APPEND_PLANE_ATTR
}
int render_dmabuf_frame(struct renderer* self, struct dmabuf_frame* frame)
{
int index = 0;
EGLint attr[6 + 10 * 4 + 1];
if (frame->n_planes == 0)
return -1;
append_attr(attr, &index, EGL_WIDTH, frame->width);
append_attr(attr, &index, EGL_HEIGHT, frame->height);
append_attr(attr, &index, EGL_LINUX_DRM_FOURCC_EXT, frame->format);
dmabuf_attr_append_planes(attr, &index, frame);
attr[index++] = EGL_NONE;
EGLImageKHR image =
eglCreateImageKHR(self->display, EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT, NULL, attr);
if (!image)
return -1;
GLuint tex;
glGenTextures(1, &tex);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, image);
gl_render();
glBindTexture(GL_TEXTURE_2D, 0);
glDeleteTextures(1, &tex);
eglDestroyImageKHR(self->display, image);
return 0;
}
/* Copy a horizontal stripe from the GL frame into a pixel buffer */
void render_copy_pixels(struct renderer* self, void* dst, uint32_t y, uint32_t height)
{
assert(y + height <= self->height);
glReadPixels(0, y, self->width, height, self->read_format,
self->read_type, dst);
}