/* viewplane is assumed to be already computed */
void camera_params_compute_matrix(CameraParams *params)
{
rctf viewplane= params->viewplane;
/* compute projection matrix */
if (params->is_ortho)
orthographic_m4(params->winmat, viewplane.xmin, viewplane.xmax,
viewplane.ymin, viewplane.ymax, params->clipsta, params->clipend);
else
perspective_m4(params->winmat, viewplane.xmin, viewplane.xmax,
viewplane.ymin, viewplane.ymax, params->clipsta, params->clipend);
}
void wmGetProjectionMatrix(float mat[4][4], const rcti *winrct)
{
int width = BLI_rcti_size_x(winrct) + 1;
int height = BLI_rcti_size_y(winrct) + 1;
orthographic_m4(mat,
-GLA_PIXEL_OFS,
(float)width - GLA_PIXEL_OFS,
-GLA_PIXEL_OFS,
(float)height - GLA_PIXEL_OFS,
-100,
100);
}
static void screen_opengl_render_doit(OGLRender *oglrender, RenderResult *rr)
{
Scene *scene = oglrender->scene;
ARegion *ar = oglrender->ar;
View3D *v3d = oglrender->v3d;
RegionView3D *rv3d = oglrender->rv3d;
Object *camera = NULL;
ImBuf *ibuf;
float winmat[4][4];
int sizex = oglrender->sizex;
int sizey = oglrender->sizey;
const short view_context = (v3d != NULL);
bool draw_bgpic = true;
bool draw_sky = (scene->r.alphamode == R_ADDSKY);
unsigned char *rect = NULL;
const char *viewname = RE_GetActiveRenderView(oglrender->re);
if (oglrender->is_sequencer) {
SeqRenderData context;
SpaceSeq *sseq = oglrender->sseq;
int chanshown = sseq ? sseq->chanshown : 0;
struct bGPdata *gpd = (sseq && (sseq->flag & SEQ_SHOW_GPENCIL)) ? sseq->gpd : NULL;
BKE_sequencer_new_render_data(
oglrender->bmain->eval_ctx, oglrender->bmain, scene,
oglrender->sizex, oglrender->sizey, 100.0f,
&context);
context.view_id = BKE_scene_multiview_view_id_get(&scene->r, viewname);
ibuf = BKE_sequencer_give_ibuf(&context, CFRA, chanshown);
if (ibuf) {
float *rectf;
ImBuf *linear_ibuf;
BLI_assert((oglrender->sizex == ibuf->x) && (oglrender->sizey == ibuf->y));
linear_ibuf = IMB_dupImBuf(ibuf);
IMB_freeImBuf(ibuf);
if (linear_ibuf->rect_float == NULL) {
/* internally sequencer working in display space and stores both bytes and float buffers in that space.
* It is possible that byte->float onversion didn't happen in sequencer (e.g. when adding image sequence/movie
* into sequencer) there'll be only byte buffer. Create float buffer from existing byte buffer, making it linear
*/
IMB_float_from_rect(linear_ibuf);
}
else {
/* ensure float buffer is in linear space, not in display space */
BKE_sequencer_imbuf_from_sequencer_space(scene, linear_ibuf);
}
rectf = RE_RenderViewGetRectf(rr, oglrender->view_id);
memcpy(rectf, linear_ibuf->rect_float, sizeof(float) * 4 * oglrender->sizex * oglrender->sizey);
IMB_freeImBuf(linear_ibuf);
}
if (gpd) {
int i;
unsigned char *gp_rect;
GPU_offscreen_bind(oglrender->ofs, true);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
wmOrtho2(0, sizex, 0, sizey);
glTranslatef(sizex / 2, sizey / 2, 0.0f);
G.f |= G_RENDER_OGL;
ED_gpencil_draw_ex(scene, gpd, sizex, sizey, scene->r.cfra, SPACE_SEQ);
G.f &= ~G_RENDER_OGL;
gp_rect = MEM_mallocN(sizex * sizey * sizeof(unsigned char) * 4, "offscreen rect");
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, gp_rect);
for (i = 0; i < sizex * sizey * 4; i += 4) {
float col_src[4];
rgba_uchar_to_float(col_src, &gp_rect[i]);
blend_color_mix_float(&rr->rectf[i], &rr->rectf[i], col_src);
}
GPU_offscreen_unbind(oglrender->ofs, true);
MEM_freeN(gp_rect);
}
}
else if (view_context) {
bool is_persp;
/* full copy */
GPUFXSettings fx_settings = v3d->fx_settings;
ED_view3d_draw_offscreen_init(scene, v3d);
GPU_offscreen_bind(oglrender->ofs, true); /* bind */
/* render 3d view */
if (rv3d->persp == RV3D_CAMOB && v3d->camera) {
/*int is_ortho = scene->r.mode & R_ORTHO;*/
camera = BKE_camera_multiview_render(oglrender->scene, v3d->camera, viewname);
RE_GetCameraWindow(oglrender->re, camera, scene->r.cfra, winmat);
if (camera->type == OB_CAMERA) {
Camera *cam = camera->data;
is_persp = cam->type == CAM_PERSP;
}
else
is_persp = true;
BKE_camera_to_gpu_dof(camera, &fx_settings);
}
else {
rctf viewplane;
float clipsta, clipend;
bool is_ortho = ED_view3d_viewplane_get(v3d, rv3d, sizex, sizey, &viewplane, &clipsta, &clipend, NULL);
if (is_ortho) orthographic_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, -clipend, clipend);
else perspective_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, clipsta, clipend);
is_persp = !is_ortho;
}
rect = MEM_mallocN(sizex * sizey * sizeof(unsigned char) * 4, "offscreen rect");
if ((scene->r.mode & R_OSA) == 0) {
ED_view3d_draw_offscreen(
scene, v3d, ar, sizex, sizey, NULL, winmat,
draw_bgpic, draw_sky, is_persp,
oglrender->ofs, oglrender->fx, &fx_settings, viewname);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
}
else {
/* simple accumulation, less hassle then FSAA FBO's */
static float jit_ofs[32][2];
float winmat_jitter[4][4];
int *accum_buffer = MEM_mallocN(sizex * sizey * sizeof(int) * 4, "accum1");
int i, j;
BLI_jitter_init(jit_ofs, scene->r.osa);
/* first sample buffer, also initializes 'rv3d->persmat' */
ED_view3d_draw_offscreen(
scene, v3d, ar, sizex, sizey, NULL, winmat,
draw_bgpic, draw_sky, is_persp,
oglrender->ofs, oglrender->fx, &fx_settings, viewname);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
for (i = 0; i < sizex * sizey * 4; i++)
accum_buffer[i] = rect[i];
/* skip the first sample */
for (j = 1; j < scene->r.osa; j++) {
copy_m4_m4(winmat_jitter, winmat);
window_translate_m4(winmat_jitter, rv3d->persmat,
(jit_ofs[j][0] * 2.0f) / sizex,
(jit_ofs[j][1] * 2.0f) / sizey);
ED_view3d_draw_offscreen(
scene, v3d, ar, sizex, sizey, NULL, winmat_jitter,
draw_bgpic, draw_sky, is_persp,
oglrender->ofs, oglrender->fx, &fx_settings, viewname);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
for (i = 0; i < sizex * sizey * 4; i++)
accum_buffer[i] += rect[i];
}
for (i = 0; i < sizex * sizey * 4; i++)
rect[i] = accum_buffer[i] / scene->r.osa;
MEM_freeN(accum_buffer);
}
GPU_offscreen_unbind(oglrender->ofs, true); /* unbind */
}
else {
/* shouldnt suddenly give errors mid-render but possible */
char err_out[256] = "unknown";
ImBuf *ibuf_view = ED_view3d_draw_offscreen_imbuf_simple(scene, scene->camera, oglrender->sizex, oglrender->sizey,
IB_rect, OB_SOLID, false, true, true,
(draw_sky) ? R_ADDSKY : R_ALPHAPREMUL, viewname, err_out);
camera = scene->camera;
if (ibuf_view) {
/* steal rect reference from ibuf */
rect = (unsigned char *)ibuf_view->rect;
ibuf_view->mall &= ~IB_rect;
IMB_freeImBuf(ibuf_view);
}
else {
fprintf(stderr, "%s: failed to get buffer, %s\n", __func__, err_out);
}
}
/* note on color management:
*
* OpenGL renders into sRGB colors, but render buffers are expected to be
* linear So we convert to linear here, so the conversion back to bytes can make it
* sRGB (or other display space) again, and so that e.g. openexr saving also saves the
* correct linear float buffer.
*/
if (rect) {
int profile_to;
float *rectf = RE_RenderViewGetRectf(rr, oglrender->view_id);
if (BKE_scene_check_color_management_enabled(scene))
profile_to = IB_PROFILE_LINEAR_RGB;
else
profile_to = IB_PROFILE_SRGB;
/* sequencer has got trickier conversion happened above
* also assume opengl's space matches byte buffer color space */
IMB_buffer_float_from_byte(rectf, rect,
profile_to, IB_PROFILE_SRGB, true,
oglrender->sizex, oglrender->sizey, oglrender->sizex, oglrender->sizex);
/* rr->rectf is now filled with image data */
if ((scene->r.stamp & R_STAMP_ALL) && (scene->r.stamp & R_STAMP_DRAW))
BKE_image_stamp_buf(scene, camera, rect, rectf, rr->rectx, rr->recty, 4);
MEM_freeN(rect);
}
}
static void screen_opengl_render_apply(OGLRender *oglrender)
{
Scene *scene = oglrender->scene;
ARegion *ar = oglrender->ar;
View3D *v3d = oglrender->v3d;
RegionView3D *rv3d = oglrender->rv3d;
RenderResult *rr;
Object *camera = NULL;
ImBuf *ibuf;
void *lock;
float winmat[4][4];
int sizex = oglrender->sizex;
int sizey = oglrender->sizey;
const short view_context = (v3d != NULL);
bool draw_bgpic = true;
bool draw_sky = (scene->r.alphamode == R_ADDSKY);
unsigned char *rect = NULL;
rr = RE_AcquireResultRead(oglrender->re);
if (oglrender->is_sequencer) {
SeqRenderData context;
int chanshown = oglrender->sseq ? oglrender->sseq->chanshown : 0;
context = BKE_sequencer_new_render_data(oglrender->bmain, scene, oglrender->sizex, oglrender->sizey, 100.0f);
ibuf = BKE_sequencer_give_ibuf(context, CFRA, chanshown);
if (ibuf) {
ImBuf *linear_ibuf;
BLI_assert((oglrender->sizex == ibuf->x) && (oglrender->sizey == ibuf->y));
linear_ibuf = IMB_dupImBuf(ibuf);
IMB_freeImBuf(ibuf);
if (linear_ibuf->rect_float == NULL) {
/* internally sequencer working in display space and stores both bytes and float buffers in that space.
* It is possible that byte->float onversion didn't happen in sequencer (e.g. when adding image sequence/movie
* into sequencer) there'll be only byte buffer. Create float buffer from existing byte buffer, making it linear
*/
IMB_float_from_rect(linear_ibuf);
}
else {
/* ensure float buffer is in linear space, not in display space */
BKE_sequencer_imbuf_from_sequencer_space(scene, linear_ibuf);
}
memcpy(rr->rectf, linear_ibuf->rect_float, sizeof(float) * 4 * oglrender->sizex * oglrender->sizey);
IMB_freeImBuf(linear_ibuf);
}
}
else if (view_context) {
ED_view3d_draw_offscreen_init(scene, v3d);
GPU_offscreen_bind(oglrender->ofs); /* bind */
/* render 3d view */
if (rv3d->persp == RV3D_CAMOB && v3d->camera) {
/*int is_ortho = scene->r.mode & R_ORTHO;*/
camera = v3d->camera;
RE_GetCameraWindow(oglrender->re, camera, scene->r.cfra, winmat);
}
else {
rctf viewplane;
float clipsta, clipend;
int is_ortho = ED_view3d_viewplane_get(v3d, rv3d, sizex, sizey, &viewplane, &clipsta, &clipend, NULL);
if (is_ortho) orthographic_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, -clipend, clipend);
else perspective_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, clipsta, clipend);
}
rect = MEM_mallocN(sizex * sizey * sizeof(unsigned char) * 4, "offscreen rect");
if ((scene->r.mode & R_OSA) == 0) {
ED_view3d_draw_offscreen(scene, v3d, ar, sizex, sizey, NULL, winmat, draw_bgpic, draw_sky);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
}
else {
/* simple accumulation, less hassle then FSAA FBO's */
static float jit_ofs[32][2];
float winmat_jitter[4][4];
int *accum_buffer = MEM_mallocN(sizex * sizey * sizeof(int) * 4, "accum1");
int i, j;
BLI_jitter_init(jit_ofs[0], scene->r.osa);
/* first sample buffer, also initializes 'rv3d->persmat' */
ED_view3d_draw_offscreen(scene, v3d, ar, sizex, sizey, NULL, winmat, draw_bgpic, draw_sky);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
for (i = 0; i < sizex * sizey * 4; i++)
accum_buffer[i] = rect[i];
/* skip the first sample */
for (j = 1; j < scene->r.osa; j++) {
copy_m4_m4(winmat_jitter, winmat);
window_translate_m4(winmat_jitter, rv3d->persmat,
(jit_ofs[j][0] * 2.0f) / sizex,
(jit_ofs[j][1] * 2.0f) / sizey);
ED_view3d_draw_offscreen(scene, v3d, ar, sizex, sizey, NULL, winmat_jitter, draw_bgpic, draw_sky);
GPU_offscreen_read_pixels(oglrender->ofs, GL_UNSIGNED_BYTE, rect);
for (i = 0; i < sizex * sizey * 4; i++)
accum_buffer[i] += rect[i];
}
for (i = 0; i < sizex * sizey * 4; i++)
rect[i] = accum_buffer[i] / scene->r.osa;
MEM_freeN(accum_buffer);
}
GPU_offscreen_unbind(oglrender->ofs); /* unbind */
}
else {
/* shouldnt suddenly give errors mid-render but possible */
char err_out[256] = "unknown";
ImBuf *ibuf_view = ED_view3d_draw_offscreen_imbuf_simple(scene, scene->camera, oglrender->sizex, oglrender->sizey,
IB_rect, OB_SOLID, FALSE, TRUE,
(draw_sky) ? R_ADDSKY: R_ALPHAPREMUL, err_out);
camera = scene->camera;
if (ibuf_view) {
/* steal rect reference from ibuf */
rect = (unsigned char *)ibuf_view->rect;
ibuf_view->mall &= ~IB_rect;
IMB_freeImBuf(ibuf_view);
}
else {
fprintf(stderr, "%s: failed to get buffer, %s\n", __func__, err_out);
}
}
/* note on color management:
*
* OpenGL renders into sRGB colors, but render buffers are expected to be
* linear So we convert to linear here, so the conversion back to bytes can make it
* sRGB (or other display space) again, and so that e.g. openexr saving also saves the
* correct linear float buffer.
*/
if (rect) {
int profile_to;
if (BKE_scene_check_color_management_enabled(scene))
profile_to = IB_PROFILE_LINEAR_RGB;
else
profile_to = IB_PROFILE_SRGB;
/* sequencer has got trickier conversion happened above
* also assume opengl's space matches byte buffer color space */
IMB_buffer_float_from_byte(rr->rectf, rect,
profile_to, IB_PROFILE_SRGB, true,
oglrender->sizex, oglrender->sizey, oglrender->sizex, oglrender->sizex);
}
/* rr->rectf is now filled with image data */
if ((scene->r.stamp & R_STAMP_ALL) && (scene->r.stamp & R_STAMP_DRAW))
BKE_stamp_buf(scene, camera, rect, rr->rectf, rr->rectx, rr->recty, 4);
RE_ReleaseResult(oglrender->re);
/* update byte from float buffer */
ibuf = BKE_image_acquire_ibuf(oglrender->ima, &oglrender->iuser, &lock);
if (ibuf) {
/* update display buffer */
if (ibuf->rect == NULL)
imb_addrectImBuf(ibuf);
IMB_partial_display_buffer_update(ibuf, rr->rectf, rect, rr->rectx, 0, 0,
&scene->view_settings, &scene->display_settings,
0, 0, rr->rectx, rr->recty, true);
/* write file for animation */
if (oglrender->write_still) {
char name[FILE_MAX];
int ok;
if (scene->r.im_format.planes == R_IMF_CHAN_DEPTH_8) {
IMB_color_to_bw(ibuf);
}
BKE_makepicstring(name, scene->r.pic, oglrender->bmain->name, scene->r.cfra, &scene->r.im_format, scene->r.scemode & R_EXTENSION, FALSE);
ok = BKE_imbuf_write_as(ibuf, name, &scene->r.im_format, TRUE); /* no need to stamp here */
if (ok) printf("OpenGL Render written to '%s'\n", name);
else printf("OpenGL Render failed to write '%s'\n", name);
}
}
BKE_image_release_ibuf(oglrender->ima, ibuf, lock);
if (rect)
MEM_freeN(rect);
}