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GP: Cleanup blend pixel function

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Clear the function that blend pixels and change parameter.
This commit is contained in:
Antonioya
2019-02-07 16:06:01 +01:00
parent f3c7f44f91
commit 8cc5b68eb1
1 changed files with 38 additions and 37 deletions
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75
source/blender/draw/engines/gpencil/gpencil_render.c
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@@ -16,8 +16,8 @@
* Copyright 2017, Blender Foundation.
*/
/** \file \ingroup draw
*/
/** \file \ingroup draw
*/
#include "BLI_rect.h"
#include "DRW_render.h"
@@ -34,10 +34,10 @@
#include "gpencil_engine.h"
/* Get pixel size for render
* This function uses the same calculation used for viewport, because if use
* camera pixelsize, the result is not correct.
*/
/* Get pixel size for render
* This function uses the same calculation used for viewport, because if use
* camera pixelsize, the result is not correct.
*/
static float get_render_pixelsize(float persmat[4][4], int winx, int winy)
{
float v1[3], v2[3];
@@ -72,7 +72,7 @@ void GPENCIL_render_init(GPENCIL_Data *ved, RenderEngine *engine, struct Depsgra
* because there is no viewport. So we need to manually create one
* NOTE : use 32 bit format for precision in render mode.
*/
/* create multiframe framebuffer for AA */
/* create multiframe framebuffer for AA */
if (U.gpencil_multisamples > 0) {
int rect_w = (int)viewport_size[0];
int rect_h = (int)viewport_size[1];
@@ -80,16 +80,16 @@ void GPENCIL_render_init(GPENCIL_Data *ved, RenderEngine *engine, struct Depsgra
}
vedata->render_depth_tx = DRW_texture_pool_query_2D(
size[0], size[1], GPU_DEPTH_COMPONENT24,
&draw_engine_gpencil_type);
size[0], size[1], GPU_DEPTH_COMPONENT24,
&draw_engine_gpencil_type);
vedata->render_color_tx = DRW_texture_pool_query_2D(
size[0], size[1], GPU_RGBA32F,
&draw_engine_gpencil_type);
size[0], size[1], GPU_RGBA32F,
&draw_engine_gpencil_type);
GPU_framebuffer_ensure_config(
&fbl->main, {
GPU_ATTACHMENT_TEXTURE(vedata->render_depth_tx),
GPU_ATTACHMENT_TEXTURE(vedata->render_color_tx)
});
&fbl->main, {
GPU_ATTACHMENT_TEXTURE(vedata->render_depth_tx),
GPU_ATTACHMENT_TEXTURE(vedata->render_color_tx)
});
/* Alloc transient data. */
if (!stl->g_data) {
@@ -141,7 +141,7 @@ static void GPENCIL_render_update_viewvecs(float invproj[4][4], float winmat[4][
{-1.0f, -1.0f, -1.0f, 1.0f},
{1.0f, -1.0f, -1.0f, 1.0f},
{-1.0f, 1.0f, -1.0f, 1.0f},
{-1.0f, -1.0f, 1.0f, 1.0f},
{-1.0f, -1.0f, 1.0f, 1.0f}
};
/* convert the view vectors to view space */
@@ -231,14 +231,14 @@ static void GPENCIL_render_result_combined(struct RenderLayer *rl, const char *v
}
/* helper to blend pixels */
static void blend_pixel(float src[4], float dst[4])
static void blend_pixel(float top_color[4], float bottom_color[4], float dst_color[4])
{
float alpha = src[3];
float alpha = top_color[3];
/* use blend: GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA */
dst[0] = (src[0] * alpha) + (dst[0] * (1.0f - alpha));
dst[1] = (src[1] * alpha) + (dst[1] * (1.0f - alpha));
dst[2] = (src[2] * alpha) + (dst[2] * (1.0f - alpha));
dst_color[0] = (top_color[0] * alpha) + (bottom_color[0] * (1.0f - alpha));
dst_color[1] = (top_color[1] * alpha) + (bottom_color[1] * (1.0f - alpha));
dst_color[2] = (top_color[2] * alpha) + (bottom_color[2] * (1.0f - alpha));
}
/* render grease pencil to image */
@@ -291,10 +291,10 @@ void GPENCIL_render_to_image(void *vedata, RenderEngine *engine, struct RenderLa
GPENCIL_render_result_z(render_layer, viewname, vedata, rect);
/* detach textures */
if (fbl->main) {
GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_depth_tx);
GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_color_tx);
}
if (fbl->main) {
GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_depth_tx);
GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_color_tx);
}
/* merge previous render image with new GP image */
if (src_rect_color_data) {
@@ -306,7 +306,6 @@ void GPENCIL_render_to_image(void *vedata, RenderEngine *engine, struct RenderLa
float *gp_pixel_depth;
float *src_pixel_rgba;
float *src_pixel_depth;
float tmp[4];
for (int i = 0; i < imgsize; i++) {
gp_pixel_rgba = &gp_rect_color_data[i * 4];
@@ -317,26 +316,28 @@ void GPENCIL_render_to_image(void *vedata, RenderEngine *engine, struct RenderLa
/* check grease pencil render transparency */
if (gp_pixel_rgba[3] > 0.0f) {
copy_v4_v4(tmp, gp_pixel_rgba);
if (src_pixel_rgba[3] > 0.0f) {
/* copy source color on back */
copy_v4_v4(gp_pixel_rgba, src_pixel_rgba);
/* check z-depth */
if (gp_pixel_depth[0] > src_pixel_depth[0]) {
/* copy source z-depth */
gp_pixel_depth[0] = src_pixel_depth[0];
/* blend gp render */
blend_pixel(tmp, gp_pixel_rgba);
/* blend object on top */
blend_pixel(src_pixel_rgba, gp_pixel_rgba);
if (src_pixel_rgba[3] < 1.0f) {
blend_pixel(src_pixel_rgba, gp_pixel_rgba, gp_pixel_rgba);
}
else {
copy_v4_v4(gp_pixel_rgba, src_pixel_rgba);
}
}
else {
/* blend gp render */
if (tmp[3] < 1.0f) {
blend_pixel(tmp, gp_pixel_rgba);
}
else {
copy_v4_v4(gp_pixel_rgba, tmp);
if (gp_pixel_rgba[3] < 1.0f) {
/* premult alpha factor to remove double blend effects */
mul_v3_fl(gp_pixel_rgba, 1.0f / gp_pixel_rgba[3]);
blend_pixel(gp_pixel_rgba, src_pixel_rgba, gp_pixel_rgba);
gp_pixel_rgba[3] = src_pixel_rgba[3];
}
}
}