GPU_offscreen: Add option for high bit depth.

This way we can render in HDR and read the real pixel values.

4 files changed, 16 insertions, 3 deletions

diff --git a/source/blender/gpu/GPU_framebuffer.h b/source/blender/gpu/GPU_framebuffer.h
index 705ef1997c1..c58d98c201e 100644
--- a/source/blender/gpu/GPU_framebuffer.h
+++ b/source/blender/gpu/GPU_framebuffer.h
@@ -83,7 +83,7 @@ void GPU_framebuffer_recursive_downsample(
  * - wrapper around framebuffer and texture for simple offscreen drawing
  * - changes size if graphics card can't support it */
 
-GPUOffScreen *GPU_offscreen_create(int width, int height, int samples, char err_out[256]);
+GPUOffScreen *GPU_offscreen_create(int width, int height, int samples, bool high_bitdepth, char err_out[256]);
 void GPU_offscreen_free(GPUOffScreen *ofs);
 void GPU_offscreen_bind(GPUOffScreen *ofs, bool save);
 void GPU_offscreen_unbind(GPUOffScreen *ofs, bool restore);
diff --git a/source/blender/gpu/GPU_texture.h b/source/blender/gpu/GPU_texture.h
index 82e215f6fae..3ed9ab4bf2c 100644
--- a/source/blender/gpu/GPU_texture.h
+++ b/source/blender/gpu/GPU_texture.h
@@ -152,6 +152,8 @@ GPUTexture *GPU_texture_create_2D(int w, int h, const float *pixels, char err_ou
 GPUTexture *GPU_texture_create_2D_custom(
         int w, int h, int channels, GPUTextureFormat data_type, const float *pixels, char err_out[256]);
 GPUTexture *GPU_texture_create_2D_multisample(int w, int h, const float *pixels, int samples, char err_out[256]);
+GPUTexture *GPU_texture_create_2D_custom_multisample(
+        int w, int h, int channels, GPUTextureFormat data_type, const float *pixels, int samples, char err_out[256]);
 GPUTexture *GPU_texture_create_2D_array_custom(
         int w, int h, int d, int channels, GPUTextureFormat data_type, const float *pixels, char err_out[256]);
 GPUTexture *GPU_texture_create_3D(int w, int h, int d, const float *pixels, char err_out[256]);
diff --git a/source/blender/gpu/intern/gpu_framebuffer.c b/source/blender/gpu/intern/gpu_framebuffer.c
index 6830e73cb03..09013cd29bd 100644
--- a/source/blender/gpu/intern/gpu_framebuffer.c
+++ b/source/blender/gpu/intern/gpu_framebuffer.c
@@ -650,7 +650,7 @@ struct GPUOffScreen {
 	GPUTexture *depth;
 };
 
-GPUOffScreen *GPU_offscreen_create(int width, int height, int samples, char err_out[256])
+GPUOffScreen *GPU_offscreen_create(int width, int height, int samples, bool high_bitdepth, char err_out[256])
 {
 	GPUOffScreen *ofs;
 
@@ -683,7 +683,12 @@ GPUOffScreen *GPU_offscreen_create(int width, int height, int samples, char err_
 		return NULL;
 	}
 
-	ofs->color = GPU_texture_create_2D_multisample(width, height, NULL, samples, err_out);
+	if (high_bitdepth) {
+		ofs->color = GPU_texture_create_2D_custom_multisample(width, height, 4, GPU_RGBA16F, NULL, samples, err_out);
+	}
+	else {
+		ofs->color = GPU_texture_create_2D_multisample(width, height, NULL, samples, err_out);
+	}
 	if (!ofs->color) {
 		GPU_offscreen_free(ofs);
 		return NULL;
diff --git a/source/blender/gpu/intern/gpu_texture.c b/source/blender/gpu/intern/gpu_texture.c
index 252eede8758..bcc0bb2649f 100644
--- a/source/blender/gpu/intern/gpu_texture.c
+++ b/source/blender/gpu/intern/gpu_texture.c
@@ -663,6 +663,12 @@ GPUTexture *GPU_texture_create_2D_multisample(int w, int h, const float *pixels,
 	return GPU_texture_create_nD(w, h, 0, 2, pixels, GPU_RGBA8, 4, samples, false, err_out);
 }
 
+GPUTexture *GPU_texture_create_2D_custom_multisample(
+        int w, int h, int channels, GPUTextureFormat data_type, const float *pixels, int samples, char err_out[256])
+{
+	return GPU_texture_create_nD(w, h, 0, 2, pixels, data_type, channels, samples, false, err_out);
+}
+
 GPUTexture *GPU_texture_create_2D_array_custom(int w, int h, int d, int channels, GPUTextureFormat data_type, const float *pixels, char err_out[256])
 {
 	return GPU_texture_create_nD(w, h, d, 2, pixels, data_type, channels, 0, false, err_out);